UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION

                          Washington, D. C. 20549

                                  FORM 8-K

                               CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of
                    the Securities Exchange Act of 1934

      Date of report (Date of earliest event reported): April 27, 2005

                                ASHLAND INC.
           (Exact name of registrant as specified in its charter)

                                  Kentucky
               (State or other jurisdiction of incorporation)


                 1-2918                             61-0122250
          (Commission File Number)                 (I.R.S. Employer
                                                  Identification No.)

 50 E. RiverCenter Boulevard, Covington, Kentucky       41012-0391
     (Address of principal executive offices)           (Zip Code)

        P.O. Box 391,  Covington,  Kentucky             41012-0391
               (Mailing Address)                        (Zip Code)

     Registrant's telephone number, including area code (859) 815-3333


Check the  appropriate  box below if the Form 8-K  filing  is  intended  to
simultaneously satisfy the filing obligation of the registrant under any of
the following provisions:

[X ]     Written communications pursuant to Rule 425 under the Securities Act
         (17 CFR 2230.425)
[  ]     Soliciting material pursuant to Rule 14a-12 under the Exchange Act
         (17 CFR 240.14a-12)
[  ]     Pre-commencement communications pursuant to Rule 14d-2(b) under the
         Exchange Act (17 CFR 240.14d-2(b))
[  ]     Pre-commencement communications pursuant to Rule 13e-4(c) under the
         Exchange Act (17 CFR 240.13e-4(c))

                                    -1-

Item 1.01 Entry into a Material Definitive Agreement On April 27, 2005, Ashland Inc. ("Ashland") signed an amendment to its agreement to transfer its 38-percent interest in Marathon Ashland Petroleum LLC ("MAP") and two other businesses to Marathon Oil Corporation ("Marathon"). Under the amended agreement, Ashland's interest in these businesses is valued at approximately $3.7 billion compared to approximately $3 billion in the earlier agreement, with substantially all the increase in value going directly to Ashland's shareholders in the form of Marathon stock. In addition, Marathon has agreed to pay the first $200 million of any Section 355(e) tax, if any, as compared to the prior agreement where Ashland bore full responsibility for any Section 355(e) tax. The transaction is expected to be tax free to Ashland's shareholders and tax efficient to Ashland. The two other businesses are Ashland's maleic anhydride business and 60 Valvoline Instant Oil Change (VIOC) centers in Michigan and northwest Ohio, which are valued at $94 million. Under the terms of the amended agreement, Ashland's shareholders will receive Marathon common stock with an aggregate value of $915 million. Based on the number of shares outstanding on March 31, 2005, shareholders would receive $12.56 in Marathon stock per Ashland share. Ashland will receive cash and MAP accounts receivable totaling $2.8 billion. In addition, MAP has not made quarterly cash distributions to Ashland and Marathon since March 18, 2004, and such distributions will continue to be suspended until the closing of the transaction. As a result, the final amount of cash to be received by Ashland will be increased by an amount equal to 38 percent of the cash accumulated from operations during the period prior to closing. At March 31, 2005, Ashland's share of this accumulated cash was $560 million. Under the terms of the earlier agreement, the closing was conditioned on receipt of private letter rulings from the Internal Revenue Service with respect to certain tax issues. Under the terms of the amended agreement, Ashland and Marathon expect to enter into a closing agreement with the IRS that will resolve these tax issues. Under the closing agreement, the retention by Ashland of certain contingent liabilities related to previously-ow ned businesses will reduce Ashland's tax basis. Ashland estimates this basis reduction may increase any Section 355(e) tax on the transaction by approximately $66 million. Marathon has agreed to pay the first $200 million of any Section 355(e) tax. Ashland would pay up to the next $175 million of Section 355(e) tax, if required. Any remaining Section 355(e) tax would be shared equally by Ashland and Marathon. Based on the number of Ashland shares outstanding as of March 31, 2005, and Ashland's current estimate of it's tax basis, Ashland expects that it would be required to pay Section 355(e) tax only if Ashland's stock price on the closing date exceeds approximately $74.50 per share. Ashland intends to use a substantial portion of the transaction proceeds to retire all or most of the company's outstanding debt and certain other financial obligations. The transaction is subject to, among other things, approval by Ashland's shareholders, consent from public debt holders, finalization of the closing agreement with the IRS and customary antitrust review. Ashland and Marathon have agreed to use their reasonable best efforts to complete the transaction by June 30, 2005, with the termination date for the transaction extended to September 30, 2005. The foregoing description of the transaction is qualified in its entirety by reference to the terms of the agreements which are filed as Exhibits to this Form 8-K and are incorporated by reference herein. Item 9.01 Financial Statements and Exhibits (a) Financial Statements of Businesses Acquired None. (b) Pro Forma Financial Information None. (c) Exhibits 2.1* Amendment No. 1 dated as of April 27, 2005 to the Master Agreement dated as of March 18, 2004 among Ashland Inc., ATB Holdings, Inc., EXM LLC, , New EXM Inc., Marathon Oil Corporation, Marathon Domestic LLC and Marathon Ashland Petroleum LLC. 2.2* Amended and Restated Tax Matters Agreement dated as of April 27, 2005, among Ashland Inc., ATB Holdings Inc., EXM LLC, New EXM Inc., Marathon Oil Corporation, Marathon Oil Company, Marathon Domestic LLC and Marathon Ashland Petroleum LLC. 2.3* Amendment No. 3 dated as of April 27, 2005 to the Amended and Restated Limited Liability Company Agreement dated as of December 31, 1998 of Marathon Ashland Petroleum LLC, by and between Ashland Inc. and Marathon Oil Company, a wholly owned subsidiary of Marathon Oil Corporation. *Ashland agrees to furnish supplementally a copy of any omitted schedule to the United States Securities and Exchange Commission upon request.

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. ASHLAND INC. -------------------------------------------- (Registrant) Date: May 2, 2005 /s/ J. Marvin Quin -------------------------------------------- Name: J. Marvin Quin Title: Senior Vice President, Chief Financial Officer

EXHIBIT INDEX 2.1* Amendment No. 1 dated as of April 27, 2005 to the Master Agreement dated as of March 18, 2004 among Ashland Inc., ATB Holdings, Inc., EXM LLC, , New EXM Inc., Marathon Oil Corporation, Marathon Domestic LLC and Marathon Ashland Petroleum LLC. 2.2* Amended and Restated Tax Matters Agreement dated as of April 27, 2005, among Ashland Inc., ATB Holdings Inc., EXM LLC, New EXM Inc., Marathon Oil Corporation, Marathon Oil Company, Marathon Domestic LLC and Marathon Ashland Petroleum LLC. 2.3* Amendment No. 3 dated as of April 27, 2005 to the Amended and Restated Limited Liability Company Agreement dated as of December 31, 1998 of Marathon Ashland Petroleum LLC, by and between Ashland Inc. and Marathon Oil Company, a wholly owned subsidiary of Marathon Oil Corporation. *Ashland agrees to furnish supplementally a copy of any omitted schedule to the United States Securities and Exchange Commission upon request.

                                                              EXHIBIT 2.1

                                                              CONFORMED COPY






                       AMENDMENT  NO. 1 dated as of April  27,  2005  (this
                  "Amendment"),  to the Master  Agreement dated as of March
                  18, 2004 (the "Master Agreement"),  among Ashland Inc., a
                  Kentucky  corporation  ("Ashland"),  ATB Holdings Inc., a
                  Delaware  corporation  ("HoldCo"),  EXM LLC,  a  Kentucky
                  limited  liability company and wholly owned subsidiary of
                  HoldCo  ("New  Ashland  LLC"),  New EXM Inc.,  a Kentucky
                  corporation  and wholly owned  subsidiary of HoldCo ("New
                  Ashland  Inc."),  Marathon  Oil  Corporation,  a Delaware
                  corporation  ("Marathon"),  Marathon Oil Company, an Ohio
                  corporation  and  wholly  owned  subsidiary  of  Marathon
                  ("Marathon  Company"),  Marathon Domestic LLC, a Delaware
                  limited  liability company and wholly owned subsidiary of
                  Marathon  ("Merger Sub") and Marathon  Ashland  Petroleum
                  LLC,  a  Delaware  limited  liability  company  owned  by
                  Marathon Company and Ashland ("MAP").


                  WHEREAS  the  parties  hereto  are  parties to the Master
Agreement,  pursuant  to which  the  parties  have  agreed  to  effect  the
Transactions  described therein  (capitalized  terms used in this Amendment
and not  defined  herein  shall have the  meanings  given such terms in the
Master Agreement);

                  WHEREAS,  simultaneously  with the execution and delivery
of this  Amendment,  the parties  hereto are  entering  into an Amended and
Restated Tax Matters  Agreement  providing for, in part, the allocation and
assignment  among  themselves of Taxes  resulting  from the  application of
Section 355(e) of the Code to the Transactions; and

                  WHEREAS  the  parties  hereto  wish to amend  the  Master
Agreement  as  provided  herein,  including  to provide  that:  (i) the New
Ashland Inc. Share Issuance shall be effected by a share issuance to HoldCo
as part of the Conversion Merger,  followed by a distribution of the shares
of New Ashland Inc.  Common Stock by HoldCo to the holders of HoldCo Common
Stock on the basis of one share of New Ashland  Inc.  Common Stock for each
outstanding share of HoldCo Common Stock, prior to the Acquisition  Merger;
(ii) the  aggregate  value of the  shares of  Marathon  Common  Stock to be
received by the holders of HoldCo Common Stock in the Acquisition Merger as
Acquisition  Merger  Consideration  shall be increased from $315,000,000 to
$915,000,000,(iii)  the Map Partial Redemption Amount shall be increased by
$100,000,000  and  (iv)  the  obligation  of the  Ashland  Parties  and the
Marathon  Parties to effect  the  Transactions  is  subject to Ashland  and
Marathon having entered into a closing  agreement with the Internal Revenue
Service in effect on the Closing Date and, if applicable,  having  received
the private letter rulings from the Internal Revenue Service, providing all
the  required  agreements  or rulings  described  in Exhibit D (as  amended
hereby) to the Master Agreement.

                  NOW, THEREFORE, the parties hereto agree as follows:

                  SECTION 1. STRUCTURE AND CONSIDERATION  AMENDMENTS TO THE
MASTER  AGREEMENT.  Effective as of the date of this Amendment,  the Master
Agreement is hereby amended as follows:

                  (a) The Index of Defined Terms in the Master Agreement is
         hereby  amended  by (i) adding  the new terms  "Distribution"  and
         "Distribution  Effective  Time"  and their  corresponding  section
         "1.04(a)", (ii) replacing the corresponding section "1.04(a)" with
         section "1.04(b)" for the terms "Acquisition  Merger",  "DGCL" and
         "DLLCA",  (iii) replacing the corresponding section "1.04(b)" with
         section  "4.05"  for  the  term  "Code"  and  (iv)  replacing  the
         corresponding  section "5.01(a)(i)" with section "5.01(a)(ii)" for
         the term  "Exchange  Agent".

                  (b)  Section  1.03(a) of the Master  Agreement  is hereby
         amended by replacing  the reference  therein to "Section  1.04(a)"
         with "Section  1.04(b)".

                  (c)  Section  1.04  of the  Master  Agreement  is  hereby
         amended  and  restated  in its  entirety in the form of Annex A to
         this Amendment.

                  (d)  Section  3.04  of the  Master  Agreement  is  hereby
         amended  and  restated  in its  entirety in the form of Annex B to
         this  Amendment.

                  (e) Sections  4.03(a) and (b) of the Master Agreement are
         hereby amended and restated in their entirety in the form of Annex
         C to this Amendment.

                  (f)  Section  4.05  of the  Master  Agreement  is  hereby
         amended  and  restated  in its  entirety in the form of Annex D to
         this  Amendment.

                  (g) Article V of the Master  Agreement is hereby  amended
         and  restated  in its  entirety  in the  form  of  Annex E to this
         Amendment.

                  (h)  Section  6.03(c) of the Master  Agreement  is hereby
         amended  and  restated  in its  entirety in the form of Annex F to
         this Amendment.

                  (i) Section  6.05(b)(ii)(A)  of the Master  Agreement  is
         hereby amended and restated in its entirety in the form of Annex G
         to this Amendment.

                  (j)  Section  9.07(b) of the Master  Agreement  is hereby
         amended  and  restated  in its  entirety in the form of Annex H to
         this Amendment.

                  (k) Section  10.02(d) of the Master  Agreement  is hereby
         amended  by  (i)  replacing  the  reference  therein  to  "Section
         1.04(b)"  with  "Section  1.04(a)"  and (ii) adding the  following
         proviso to the end thereof:  ";  provided,  however,  that each of
         Ashland  and HoldCo  hereby  covenant  to cause  their  respective
         boards of  directors to convene a meeting and to make a good faith
         determination  with respect to the foregoing prior to the date the
         Closing  would  otherwise  occur  but  for  the  failure  of  this
         condition  to  be  satisfied."

                  (l) Sections  13.01(b)(x) and  13.02(b)(ix) of the Master
         Agreement are hereby amended by replacing the  references  therein
         to "$315,000,000" with  "$815,000,000".

                  (m) The  definition  of the term "MAP Partial  Redemption
         Amount"  set forth in  Section  14.02 of the Master  Agreement  is
         hereby   amended   by   replacing   the   reference   therein   to
         "$2,699,170,000" with "$2,799,170,000".

                  (n) The  definition of the term "New Ashland Inc.  Common
         Stock"  set forth in  Section  14.02 of the  Master  Agreement  is
         hereby amended and restated in its entirety in the form of Annex I
         to this  Amendment.

                  (o) Clause (iii) of the third  sentence of Section  14.06
         of the Master  Agreement  is hereby  amended  and  restated in its
         entirety in the form of Annex J to this Amendment.

                  SECTION 2. TAX CLOSING CONDITION AMENDMENTS TO THE MASTER
AGREEMENT. Effective as of the date of this Amendment, the Master Agreement
is hereby amended as follows:

                  (a) The Index of Defined Terms in the Master Agreement is
         hereby amended by adding the new term "Closing  Agreement" and its
         corresponding  section "14.02".

                  (b) Clauses (iii) and (iv) of the sixth recital set forth
         in the Master  Agreement are hereby  amended and restated in their
         entirety in the form of Annex K to this Amendment.

                  (c) Sections 9.03(b) and 9.16 of the Master Agreement and
         the  definition of the term "Ashland Debt  Obligation  Amount" set
         forth in Section 14.02 of the Master  Agreement are hereby amended
         by replacing the references  therein to "Private  Letter  Rulings"
         with "Closing  Agreement or Private Letter  Rulings".

                  (d) Section  10.01(f) of the Master  Agreement  is hereby
         amended  and  restated  in its  entirety in the form of Annex L to
         this  Amendment.

                  (e)  Section  14.02 of the  Master  Agreement  is  hereby
         amended by adding the  following  defined term at the  appropriate
         alphabetical location:

                       "Closing  Agreement" means the closing  agreement to
                  be entered  into by Marathon,  Ashland,  New Ashland Inc.
                  and certain  related  parties and the IRS with respect to
                  the  Transactions  pursuant  to  Code  Section  7121  and
                  described in Section 5.01 of the Tax Matters Agreement.

                  (f) Exhibit D to the Master  Agreement is hereby  amended
         and  restated  in its  entirety  in the  form  of  Annex M to this
         Amendment.

                  SECTION 3.  OTHER  AMENDMENTS  TO THE  MASTER  AGREEMENT.
Effective as of the date of this Amendment,  the Master Agreement is hereby
amended as follows:

                  (a) The  last  sentence  of  Section  1.05 of the  Master
         Agreement is hereby deleted.

                  (b) The first  sentence of Section  9.03(a) of the Master
         Agreement  is hereby  amended and  restated in its entirety in the
         form of Annex N to this Amendment.

                  (c) The first  sentence of Section  9.09(b) of the Master
         Agreement  is hereby  amended and  restated in its entirety in the
         form of Annex O to this Amendment.

                  (d) The first  sentence  of  Section  9.16 of the  Master
         Agreement  is hereby  amended and  restated in its entirety in the
         form of Annex P to this Amendment.

                  (e) Article IX of the Master  Agreement is hereby amended
         by  adding  a new  Section  9.17 in the  form  of  Annex Q to this
         Amendment at the appropriate numerical location.

                  (f) Section  10.01(c) of the Master  Agreement  is hereby
         amended by adding the following words  immediately after the first
         occurrence of the word  "Transactions":  "(other than the transfer
         of the Ashland LOOP/LOCAP  Interest)".

                  (g) Section 11.01(b)(i) of the Master Agreement is hereby
         amended  and  restated  in its  entirety in the form of Annex R to
         this Amendment.

                  (h)  Section  14.02 of the  Master  Agreement  is  hereby
         amended by adding the following  defined terms at the  appropriate
         alphabetical locations:

                  "Ashland Affected  Non-Qualified Employee Stock Option or
         SAR" means any  Ashland  Non-Qualified  Employee  Stock  Option or
         Ashland  SAR  granted to an  employee  of MAP,  Marathon or any of
         their  subsidiaries who is actively employed with MAP, Marathon or
         any of their subsidiaries immediately prior to the Closing that is
         outstanding and unexercised  immediately  prior to the Closing and
         (i) was granted in 2001 or 2002 and is unvested  immediately prior
         to the  Closing or (ii) was  granted in 2003 and is  scheduled  to
         vest on September 18, 2005. For purposes of this  definition,  any
         employee of MAP, Marathon or any of their  subsidiaries who is not
         actively at work immediately  prior to the Closing due solely to a
         leave of absence (including due to vacation,  holiday, sick leave,
         maternity  or  paternity   leave,   military  leave,   jury  duty,
         bereavement  leave,  injury or short-term  disability)  other than
         long-term  disability,  in compliance with applicable  policies of
         MAP,  Marathon or such subsidiary,  shall be deemed to be actively
         employed with MAP,  Marathon or such subsidiary  immediately prior
         to the Closing.

                  "Ashland  Non-Qualified  Employee Stock Option" means any
         Ashland  Employee  Stock  Option  granted  under  the terms of the
         Ashland  Inc.  Stock Option Plan for  Employees of Joint  Ventures
         that is not  intended to qualify as an  "incentive  stock  option"
         within the meaning of Section 422 of the Code.

                  (i) The  definition of the term "MAP  Adjustment  Amount"
         set  forth in  Section  14.02 of the  Master  Agreement  is hereby
         amended  and  restated  in its  entirety in the form of Annex S to
         this Amendment.

                  SECTION  4.  EFFECT ON THE  MASTER  AGREEMENT.  Except as
specifically  amended by this Amendment,  the Master Agreement shall remain
in full  force and  effect  and the  Master  Agreement,  as amended by this
Amendment,  is hereby  ratified and affirmed in all respects.  On and after
the  date  hereof,   each  reference  in  the  Master  Agreement  to  "this
Agreement," "herein," "hereunder" or words of similar import shall mean and
be a reference to the Master Agreement as amended by this Amendment.

                  SECTION 5.  INTERPRETATION.  When a reference  is made in
this  Amendment  to a Section  or  Article,  such  reference  shall be to a
Section  or Article  of this  Amendment  unless  otherwise  indicated.  The
headings  contained in this  Amendment are for reference  purposes only and
shall  not  affect  in any  way  the  meaning  or  interpretation  of  this
Amendment. Whenever the words "include", "includes" or "including" are used
in this  Amendment,  they  shall be  deemed  to be  followed  by the  words
"without limitation".

                  SECTION 6.  SEVERABILITY.  If any term or other provision
of this Amendment is invalid, illegal or incapable of being enforced by any
rule or Law, or public policy,  all other conditions and provisions of this
Amendment shall nevertheless remain in full force and effect so long as the
economic or legal substance of the transactions  contemplated hereby is not
affected in any manner  materially  adverse to any party hereto.  Upon such
determination  that any term or other  provision  is  invalid,  illegal  or
incapable of being  enforced,  the parties  hereto shall  negotiate in good
faith to modify this  Amendment so as to effect the original  intent of the
parties  hereto as closely  as  possible  to the end that the  transactions
contemplated hereby are fulfilled to the greatest extent possible.

                  SECTION 7.  COUNTERPARTS.  This Amendment may be executed
in one or more  counterparts,  all of which shall be considered one and the
same  agreement and shall become  effective  when one or more  counterparts
have been signed by each of the parties and delivered to the other parties.

                  SECTION 8. NO THIRD-PARTY  BENEFICIARIES.  This Amendment
is not intended to confer upon any person other than the parties hereto any
rights or remedies.

                  SECTION 9.  EXERCISE  OF RIGHTS AND  REMEDIES.  Except as
this Amendment otherwise provides, no delay or omission in the exercise of,
or failure to assert,  any  right,  power or remedy  accruing  to any party
hereto as a result of any breach or default  hereunder  by any other  party
hereto  will  impair  any  such  right,  power  or  remedy,  nor will it be
construed, deemed or interpreted as a waiver of or acquiescence in any such
breach or default, or of any similar breach or default occurring later; nor
will any waiver of any single  breach or  default be  construed,  deemed or
interpreted as a waiver of any other breach or default hereunder  occurring
before or after that waiver.  The failure of any party to this Amendment to
assert  any of its rights  under  this  Amendment  or  otherwise  shall not
constitute a waiver of such rights.

                  SECTION  10.  GOVERNING  LAW.  THIS  AMENDMENT  SHALL  BE
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK,  REGARDLESS OF THE LAWS THAT MIGHT OTHERWISE  GOVERN UNDER APPLICABLE
PRINCIPLES OF CONFLICTS OF LAWS THEREOF.

                  SECTION 11. ASSIGNMENT. Neither this Amendment nor any of
the  rights,  interests  or  obligations  under  this  Amendment  shall  be
assigned,  in whole or in part,  by any of the  parties  without  the prior
written consent of the other parties, except that the rights, interests and
obligations  of any party under this Amendment may be assigned by operation
of law pursuant to a merger,  consolidation  or other business  combination
involving  such  party  that would not  reasonably  expected  to prevent or
materially delay the consummation of the Transactions;  provided,  however,
that any  assignment  pursuant to the  exception set forth in this sentence
shall not  operate to release  any party  from its  obligations  under this
Amendment.  Subject to the  preceding  sentences,  this  Amendment  will be
binding upon,  inure to the benefit of, and be enforceable  by, the parties
and their respective successors and assigns.

                  SECTION  12.   ENFORCEMENT.   The   parties   agree  that
irreparable  damage would occur in the event that any of the  provisions of
the  Transaction  Agreements  were not performed in  accordance  with their
specific terms or were otherwise  breached.  It is accordingly agreed that,
subject to Sections  13.01(c)  and  13.02(c) of the Master  Agreement,  the
parties  shall be  entitled  to an  injunction  or  injunctions  to prevent
breaches  of this  Amendment  and to  enforce  specifically  the  terms and
provisions  of this  Amendment  in any New York state  court or any Federal
court  located  in the  Borough of  Manhattan,  The City of New York in the
State of New York, this being in addition to any other remedy to which they
are entitled at law or in equity.  In addition,  each of the parties hereto
(a) consents to submit itself to the personal  jurisdiction of any New York
state court or any Federal court  located in the Borough of Manhattan,  The
City of New York in the State of New York in the event any  dispute  arises
out of this  Amendment,  (b)  agrees  that it will not  attempt  to deny or
defeat such personal jurisdiction by motion or other request for leave from
any such court,  (c) agrees  that it will not bring any action  relating to
this  Amendment  in any court  other than any New York  state  court or any
Federal court sitting in the Borough of Manhattan,  The City of New York in
the State of New York  (provided,  however,  that this clause (c) shall not
limit the ability of any party hereto to (i) file a proof of claim or bring
any action in any court in which a bankruptcy or reorganization  proceeding
involving  another party hereto is pending,  (ii) file a  counter-claim  or
cross-claim against another party hereto in any court in which a proceeding
involving  both such  parties  is pending or (iii)  implead  another  party
hereto in respect of a Third Party Claim in any court in which a proceeding
relating  to such Third  Party  Claim is then  pending)  and (d) waives any
right to trial by jury with respect to any action related to or arising out
of this Amendment.



IN WITNESS WHEREOF, the parties hereto have duly executed this Amendment, all as of the date first written above. ASHLAND INC., by /s/ James J. O'Brien ------------------------ Name: James J. O'Brien Title: Chief Executive Officer ATB HOLDINGS INC., by /s/ James J. O'Brien ------------------------ Name: James J. O'Brien Title: President EXM LLC, by ATB HOLDINGS INC., by /s/ James J. O'Brien ------------------------ Name: James J. O'Brien Title: President NEW EXM INC., by /s/ James J. O'Brien ------------------------ Name: James J. O'Brien Title: President

MARATHON OIL CORPORATION, by /s/ Janet F. Clark ------------------------ Name: Janet F. Clark Title: Senior Vice President and Chief Financial Officer MARATHON OIL COMPANY, by /s/ Janet F. Clark ------------------------ Name: Janet F. Clark Title: Senior Vice President MARATHON DOMESTIC LLC, by MARATHON OIL CORPORATION, by /s/ Janet F. Clark ------------------------ Name: Janet F. Clark Title: Senior Vice President and Chief Financial Officer MARATHON ASHLAND PETROLEUM LLC, by /s/ Anthony R. Kenney ------------------------ Name: Anthony R. Kenney Title: Vice President

ANNEX A SECTION 1.04. Distribution; Acquisition Merger. (a) Promptly following the Conversion Merger Effective Time, HoldCo shall distribute to the holders of HoldCo Common Stock (as defined in Section 2.04(a)(i)) shares of New Ashland Inc. Common Stock on the basis of one share of New Ashland Inc. Common Stock for each outstanding share of HoldCo Common Stock (the "Distribution"). On or prior to the Closing Date, the Board of Directors of HoldCo shall formally declare the Distribution and shall authorize and direct HoldCo to pay it promptly following the Conversion Merger Effective Time by delivery of certificates representing shares of New Ashland Inc. Common Stock to the Exchange Agent (as defined in Section 5.01(a)(ii)) for delivery to the holders of HoldCo Common Stock entitled thereto. The Distribution shall be deemed effective upon written notification by HoldCo to the Exchange Agent that the Distribution has been declared and that the Exchange Agent is authorized to proceed with the distribution of New Ashland Inc. Common Stock (the "Distribution Effective Time"). (b) Promptly following the Distribution Effective Time, pursuant to Article IV and in accordance with the Delaware General Corporation Law (the "DGCL") and the Delaware Limited Liability Company Act (the "DLLCA"), HoldCo shall be merged with and into Merger Sub (the "Acquisition Merger") at the Acquisition Merger Effective Time.

ANNEX B SECTION 3.04. Conversion of New Ashland Securities. At the Conversion Merger Effective Time, by virtue of the Conversion Merger and without any action on the part of HoldCo: (a) each New Ashland LLC Interest issued and outstanding immediately prior to the Conversion Merger Effective Time shall be converted into and thereafter represent a number of duly issued, fully paid and nonassessable shares of New Ashland Inc. Common Stock equal to the quotient of (x) the number of shares of HoldCo Common Stock issued and outstanding immediately prior to the Conversion Merger Effective Time divided by (y) the number of New Ashland LLC Interests issued and outstanding immediately prior to the Conversion Merger Effective Time; and (b) each share of New Ashland Inc. Common Stock held by HoldCo immediately prior to the Conversion Merger Effective Time shall automatically be canceled and retired and shall cease to exist, and no consideration shall be delivered or deliverable in exchange therefor.

ANNEX C SECTION 4.03. Effect on Capital Stock. (a) At the Acquisition Merger Effective Time, by virtue of the Acquisition Merger and without any action on the part of the holder of any shares of HoldCo Common Stock or any membership interests in Merger Sub: (i) subject to Section 5.01(e), each issued and outstanding share of HoldCo Common Stock shall be converted into the right to receive a number of duly issued, fully paid and nonassessable shares of Marathon Common Stock equal to the Exchange Ratio (as defined in Section 4.03(b)); and (ii) all of the limited liability company interests in Merger Sub issued and outstanding immediately prior to the Acquisition Merger Effective Time shall remain outstanding without change. (b) The shares of Marathon Common Stock to be issued upon the conversion of shares of HoldCo Common Stock pursuant to Section 4.03(a)(i) and cash in lieu of fractional shares of Marathon Common Stock as contemplated by Section 5.01(e) are referred to collectively as "Acquisition Merger Consideration". As of the Acquisition Merger Effective Time, all such shares of HoldCo Common Stock shall no longer be outstanding and shall automatically be canceled and retired and shall cease to exist, and each holder of a certificate formerly representing the right to receive any such shares of HoldCo Common Stock pursuant to Section 2.04(b) shall cease to have any rights with respect thereto, except the right to receive, upon surrender of such certificate in accordance with Section 5.01, the Acquisition Merger Consideration, without interest. "Exchange Ratio" means $915,000,000 divided by the product of (x) the Fair Market Value and (y) the total number of shares of Ashland Common Stock issued and outstanding immediately prior to the Reorganization Merger Effective Time. "Fair Market Value" means an amount equal to the average of the closing sale prices per share for the Marathon Common Stock on the New York Stock Exchange (the "NYSE"), as reported in The Wall Street Journal, Northeastern edition, for each of the twenty consecutive trading days ending with the third complete trading day prior to the Closing Date (not counting the Closing Date) (the "Averaging Period"). Notwithstanding the foregoing, if the Board of Directors of Marathon (the "Marathon Board") declares a dividend on the outstanding shares of Marathon Common Stock having a record date before the Closing Date but an ex-dividend date (based on "regular way" trading on the NYSE of shares of Marathon Common Stock) (the "Ex-Date") that occurs after the first trading day of the Averaging Period, then for purposes of computing the Fair Market Value, the closing price on any trading day before the Ex-Date will be adjusted by subtracting therefrom the amount of such dividend. For purposes of the immediately preceding sentence, the amount of any noncash dividend will be the fair market value thereof on the payment date for such dividend as determined in good faith by mutual agreement of Ashland and Marathon.

ANNEX D SECTION 4.05. Tax Treatment. The parties intend that (a) the Reorganization Merger will qualify as a "reorganization" within the meaning of Section 368(a) of the Internal Revenue Code of 1986, as amended (the "Code"), and the rules and regulations promulgated thereunder and Ashland and HoldCo will each be a "party" to such reorganization within the meaning of Section 368(b) of the Code, (b) the Conversion Merger followed by the Distribution will qualify as a "reorganization" within the meaning of Section 368(a) of the Code and a transaction described in Section 355 of the Code and HoldCo and New Ashland Inc. will each be a "party" to such reorganization within the meaning of Section 368(b) of the Code, (c) the Acquisition Merger will qualify as a "reorganization" within the meaning of Section 368(a) of the Code and HoldCo and Marathon will each be a "party" to such reorganization within the meaning of Section 368(b) of the Code and (d) this Agreement will constitute a "plan of reorganization" for U.S. Federal income Tax purposes.

ANNEX E ARTICLE V Exchange of HoldCo Certificates SECTION 5.01. Exchange of Certificates. (a) Exchange Agent. (i) [Intentionally Omitted.] (ii) Promptly following the Acquisition Merger Effective Time, Marathon shall issue and deposit with an exchange agent designated by Ashland and reasonably acceptable to Marathon (the "Exchange Agent"), for the benefit of the holders of shares of HoldCo Common Stock, for exchange in accordance with this Article V, through the Exchange Agent, certificates representing a number of shares of Marathon Common Stock equal to the product of (x) the total number of shares of Ashland Common Stock issued and outstanding immediately prior to the Reorganization Merger Effective Time and (y) the Exchange Ratio, rounded up to the nearest whole share. Marathon shall provide to the Exchange Agent (or, following the termination of the Exchange Fund pursuant to Section 5.01(f), to New Ashland Inc. so long as it is the record holder on the applicable record date of shares of Marathon Common Stock delivered to New Ashland Inc. upon such termination) following the Acquisition Merger Effective Time all the cash necessary to pay any dividends or other distributions in accordance with Section 5.01(c)(ii) (the shares of Marathon Common Stock, together with the cash provided to pay any dividends or distributions with respect thereto, deposited with the Exchange Agent being hereinafter referred to as the "Exchange Fund"). For the purposes of such deposit, Marathon shall assume that there will not be any fractional shares of Marathon Common Stock. (iii) The Exchange Agent shall, pursuant to irrevocable instructions delivered by New Ashland Inc. and Marathon, deliver the Marathon Common Stock contemplated to be issued pursuant to Section 4.03 and this Article V out of the Exchange Fund. The Exchange Fund shall not be used for any other purpose. (b) Exchange Procedures. As promptly as reasonably practicable after the Acquisition Merger Effective Time, the Exchange Agent shall mail to each holder of record of a certificate or certificates (each, a "Certificate") that immediately prior to the Reorganization Merger Effective Time represented outstanding shares of Ashland Common Stock (other than holders of Dissenters' Shares), (i) a letter of transmittal (which shall specify that delivery shall be effected, and risk of loss and title to the Certificate or Certificates shall pass, only upon delivery of the Certificate or Certificates to the Exchange Agent and shall be in such form and have such other provisions as New Ashland Inc. and Marathon may reasonably specify) and (ii) instructions for use in effecting the surrender of the Certificate or Certificates in exchange for Acquisition Merger Consideration. Upon surrender of a Certificate or Certificates for cancelation to the Exchange Agent or, following termination of the Exchange Fund pursuant to Section 5.01(f), New Ashland Inc., together with such letter of transmittal, duly executed and completed in accordance with the instructions thereto, and such other documents as may reasonably be required by the Exchange Agent or New Ashland Inc., as applicable, the holder of such Certificate or Certificates shall be entitled to receive in exchange therefor (i) a certificate or certificates representing that number of whole shares of Marathon Common Stock that such holder has the right to receive pursuant to the provisions of Section 4.03 and this Article V, (ii) cash in lieu of fractional shares of Marathon Common Stock that such holder has the right to receive pursuant to Section 5.01(e) and (iii) any dividends or other distributions such holder has the right to receive pursuant to Section 5.01(c), and the Certificate or Certificates so surrendered shall forthwith be canceled. In the event of a transfer of ownership of Ashland Common Stock or HoldCo Common Stock that is not registered in the transfer records of Ashland or HoldCo, a certificate or certificates representing the appropriate number of shares of Marathon Common Stock, together with a check for cash to be paid in lieu of fractional shares, may be issued and paid to a person other than the person in whose name the Certificate or Certificates so surrendered is registered, if such Certificate or Certificates shall be properly endorsed or otherwise be in proper form for transfer and the person requesting such issuance and payment shall pay any transfer or other Taxes required by reason of the issuance of shares of Marathon Common Stock to a person other than the registered holder of such Certificate or Certificates or establish to the satisfaction of New Ashland Inc. that such Tax has been paid or is not applicable. Until surrendered as contemplated by this Section 5.01, each Certificate shall be deemed at any time after the Acquisition Merger Effective Time to represent only the right to receive upon such surrender Acquisition Merger Consideration as contemplated by this Section 5.01. No interest shall be paid or accrue on any cash in lieu of fractional shares or accrued and unpaid dividends or distributions, if any, payable upon surrender of any Certificate. (c) Distributions with Respect to Unexchanged Shares. (i) [Intentionally Omitted.] (ii) No dividends or other distributions with respect to shares of Marathon Common Stock with a record date on or after the Closing Date shall be paid to the holder of any Certificate with respect to the shares of Marathon Common Stock issuable upon surrender thereof, and no cash payment in lieu of fractional shares shall be paid to any such holder pursuant to Section 5.01(e), until the surrender of such Certificate in accordance with this Article V. Subject to applicable Law, following surrender of any such Certificate, there shall be paid to the holder of the certificate representing whole shares of Marathon Common Stock issued in exchange therefor, without interest, (A) at the time of such surrender, the amount of any cash payable in lieu of a fractional share of Marathon Common Stock to which such holder is entitled pursuant to Section 5.01(e) and the amount of dividends or other distributions with a record date on or after the Closing Date theretofore paid with respect to such whole shares of Marathon Common Stock and (B) at the appropriate payment date, the amount of dividends or other distributions with a record date on or after the Closing Date but prior to such surrender and a payment date subsequent to such surrender payable with respect to such whole shares of Marathon Common Stock. (d) No Further Ownership Rights in HoldCo Common Stock. The Acquisition Merger Consideration issued (and paid) upon conversion of any shares of HoldCo Common Stock in accordance with the terms of this Article V shall be deemed to have been issued (and paid) in full satisfaction of all rights pertaining to such shares of HoldCo Common Stock, and after the Acquisition Merger Effective Time there shall be no further registration of transfers on the stock transfer books of the business entity surviving the Acquisition Merger, Merger Sub, of shares of HoldCo Common Stock that were outstanding immediately prior to the Acquisition Merger Effective Time. If, after the Acquisition Merger Effective Time, any Certificates are presented to New Ashland Inc. or the Exchange Agent for any reason, they shall be canceled and exchanged as provided in this Article V except as otherwise provided by applicable Law. Unless Marathon otherwise consents, the Acquisition Merger Consideration shall not be issued to any person who is an "affiliate" of Ashland for purposes of Rule 145 under the Securities Act of 1933, as amended (the "Securities Act"), on the date of the Ashland Shareholders Meeting, as determined from representations contained in the letters of transmittal to be delivered by former holders of shares of Ashland Common Stock pursuant to the provisions of Section 5.01(b) (a "Rule 145 Affiliate"), until Marathon has received a written agreement from such Rule 145 Affiliate substantially in the form attached hereto as Exhibit C; provided, however, that Marathon shall be solely responsible for any Losses (as defined in Section 13.01(a)) of any of the Ashland Parties and their respective affiliates and Representatives (in each case other than such Rule 145 Affiliate) to the extent resulting from, arising out of, or relating to, directly or indirectly, any refusal by Marathon to consent to the issuance of Acquisition Merger Consideration to any such Rule 145 Affiliate pursuant to this sentence. (e) No Fractional Shares. (i) No certificates or scrip representing fractional shares of Marathon Common Stock shall be issued upon the conversion of HoldCo Common Stock pursuant to Section 4.03, and such fractional share interests shall not entitle the owner thereof to vote or to any rights of a holder of Marathon Common Stock. For purposes of this Section 5.01(e), all fractional shares to which a single record holder would be entitled shall be aggregated and calculations shall be rounded to three decimal places. Notwithstanding any other provision of this Agreement, each holder of Certificates who otherwise would be entitled to receive a fraction of a share of Marathon Common Stock (determined after taking into account all Certificates delivered by such holder) shall receive, in lieu thereof, cash (without interest) in an amount equal to the product of such fractional part of a share of Marathon Common Stock multiplied by the Fair Market Value. (ii) As promptly as practicable following the Acquisition Merger Effective Time, the Exchange Agent shall determine the excess of (A) the number of shares of Marathon Common Stock delivered to the Exchange Agent by Marathon pursuant to Section 5.01(a) over (B) the aggregate number of whole shares of Marathon Common Stock to be issued to holders of HoldCo Common Stock pursuant to Section 5.01(b) (such excess being herein called the "Excess Shares"). As promptly as practicable after such determination, Marathon shall deposit an amount into the Exchange Fund equal to the product of the number of Excess Shares multiplied by the Fair Market Value, and the Exchange Agent shall return certificates representing such Excess Shares to Marathon. (f) Termination of Exchange Fund. Any portion of the Exchange Fund that remains undistributed to the holders of Certificates for six months after the Acquisition Merger Effective Time shall be delivered to or in accordance with the instructions of New Ashland Inc., upon demand, and any holder of a Certificate who has not theretofore complied with this Article V shall thereafter look only to New Ashland Inc. for payment of its claim for Acquisition Merger Consideration and any dividends or distributions with respect to Marathon Common Stock as contemplated by Section 5.01(c). (g) Lost Certificates. If any Certificate shall have been lost, stolen or destroyed, upon the making of an affidavit of that fact by the person claiming such Certificate to be lost, stolen or destroyed and, if required by New Ashland Inc., the execution of an indemnity reasonably satisfactory to New Ashland Inc. (and, if required by New Ashland Inc., the posting by such person of a bond in such reasonable amount as New Ashland Inc. may direct, as indemnity) against any claim that may be made against it with respect to such Certificate, the Exchange Agent will deliver in exchange for such lost, stolen or destroyed Certificate the applicable Acquisition Merger Consideration with respect to the shares of HoldCo Common Stock formerly represented thereby, and any dividends or other distributions such holder has the right to receive in respect thereof, pursuant to this Agreement. (h) Withholding Rights. Marathon shall be entitled to deduct and withhold from the consideration otherwise payable pursuant to this Agreement to any holder of Certificates and any holder of Dissenters' Shares such amounts as may be required to be deducted and withheld by Marathon with respect to the making of such payment under the Code or under any provision of state, local or foreign Tax Law. To the extent that amounts are so withheld and paid over to the appropriate Tax Authority (as defined in Section 14.02), Marathon will be treated as though it withheld an appropriate amount of the type of consideration otherwise payable pursuant to this Agreement to any holder of Certificates or Dissenters' Shares, sold such consideration for an amount of cash equal to the fair market value of such consideration at the time of such deemed sale and paid such cash proceeds to the appropriate Tax Authority. Such withheld amounts shall be treated for all purposes of this Agreement as having been paid to the holder of the shares represented by the Certificates or Dissenters' Shares, as the case may be, in respect of which such deduction and withholding was made. (i) No Liability. None of the Ashland Parties, the Marathon Parties or the Exchange Agent shall be liable to any person in respect of any shares of Marathon Common Stock (or dividends or distributions with respect thereto) or cash from the Exchange Fund delivered to a public official pursuant to any applicable abandoned property, escheat or similar Law. If any Certificate has not been surrendered prior to five years after the Acquisition Merger Effective Time (or immediately prior to such earlier date on which Acquisition Merger Consideration or any dividends or distributions with respect to Marathon Common Stock as contemplated by Section 5.01(c) in respect of such Certificate would otherwise escheat to or become the property of any Governmental Entity (as defined in Section 6.05(b))), any such shares, cash, dividends or distributions in respect of such Certificate shall, to the extent permitted by applicable Law, become the property of New Ashland Inc., free and clear of all claims or interest of any person previously entitled thereto. (j) Investment of Exchange Fund. The Exchange Agent shall invest any cash included in the Exchange Fund, as directed by New Ashland Inc., on a daily basis. Any interest and other income resulting from such investments shall be paid to New Ashland Inc.

ANNEX F (c) As of the date of this Agreement, the authorized capital stock of New Ashland Inc. consists of 1,000 shares of Common Stock, of which 100 shares of Common Stock have been duly authorized and validly issued, are fully paid and nonassessable and are owned by HoldCo free and clear of any Lien. Immediately prior to the Conversion Merger Effective Time, the authorized capital stock of New Ashland Inc. will consist of 200,000,000 shares of Common Stock and 30,000,000 shares of preferred stock, of which 100 shares of Common Stock will have been duly authorized and validly issued, fully paid and nonassessable and owned by HoldCo free and clear of any Lien, other than any Lien (i) pursuant to the HoldCo Borrowing arrangements or (ii) in favor of any Marathon Party or any of their respective subsidiaries or affiliates.

ANNEX G (ii) the filing with the Securities and Exchange Commission (the "SEC") of (A) a joint registration --- statement on Form S-4 (the "Ashland Form S-4") in connection with the issuance by HoldCo of HoldCo Common Stock in connection with the Reorganization Merger (the "HoldCo Share Issuance") and the issuance by New Ashland Inc. of New Ashland Inc. Common Stock in the Conversion Merger, followed by the distribution thereof to holders of HoldCo Common Stock in the Distribution (the "New Ashland Inc. Share Issuance"),

ANNEX H (b) Ashland and New Ashland Inc. shall prepare and submit to the NYSE or The Nasdaq Stock Market ("NASDAQ") an application (or amendment thereto) for listing on the NYSE or NASDAQ of the New Ashland Inc. Common Stock to be issued to holders of Ashland Common Stock in the Distribution, and shall use their reasonable best efforts to obtain, prior to the Ashland Shareholders Meeting, approval for the listing of such shares, subject to official notice of issuance.

ANNEX I "New Ashland Inc. Common Stock" means New Ashland Inc. common stock, par value $0.01 per share, and, with respect to such shares issued at and after the Conversion Merger Effective Time, includes the associated Ashland Rights.

ANNEX J (iii) after the Closing, the holders entitled to receive HoldCo Common Stock in the Reorganization Merger shall have the rights and remedies specified in Section 1.04(a) and Article V only.

ANNEX K (iii) a Tax Matters Agreement (as amended and restated as of April 27, 2005 the "Tax Matters Agreement"); and (iv) Amendment No. 2 to the MAP LLC Agreement (as defined in Section 14.02) (the "MAP LLC Agreement Amendment" and, together with this Agreement, the Maleic Agreement, the VIOC Agreement, the Tax Matters Agreement and Amendment No. 3 dated as of April 27, 2005, to the MAP LLC Agreement, the "Transaction Agreements");

ANNEX L (f) Closing Agreement; Private Letter Rulings; Tax Opinions. Ashland and Marathon shall have entered into the Closing Agreement with the IRS (which Closing Agreement shall be in effect on the Closing Date) and, if applicable, received the private letter rulings from the IRS referred to in Exhibit D (the "Private Letter Rulings"),providing all the required agreements or rulings described in Exhibit D and in form and substance reasonably satisfactory to each of the Ashland Board and the Marathon Board. Ashland and Marathon shall have received the respective Tax Opinions, dated as of the Closing Date, described in Exhibit D (to the extent such Tax Opinions are required under Exhibit D).

ANNEX M EXHIBIT D CLOSING AGREEMENT/PRIVATE LETTER RULING/TAX OPINION CLOSING CONDITIONS STRUCTURE 1. The Closing Agreement provides that the Maleic/VIOC Contribution described in Section 1.02(a), the MAP/LOOP/LOCAP Contribution described in Section 1.02(b) and the Reorganization Merger described in Section 1.02(c), taken together, qualify as a reorganization under Section 368(a)(1)(F) of the Code. 2. The Closing Agreement provides that the Capital Contribution described in Section 1.03(b) and the Conversion Merger described in Section 1.03(c), taken together with the Distribution described in Section 1.04(a) qualify as a reorganization under Section 368(a)(1)(D) of the Code. 3. The Closing Agreement provides that the Distribution described in Section 1.04(a) qualifies as a distribution described in Section 355(a) of the Code and, accordingly, no gain or loss will be recognized by (and no amount will otherwise be included in the income of) the shareholders of HoldCo upon the receipt of New Ashland Inc. Common Stock pursuant to the Distribution. 4. Either: (a) The Closing Agreement provides that the Acquisition Merger described in Section 1.04(b) will qualify as a reorganization under Section 368(a)(1)(A) of the Code; or (b) If the Closing Agreement does not provide the agreement described in paragraph 4(a) above, Cravath, Swaine & Moore LLP delivers a written opinion to Ashland, in form and substance reasonably satisfactory to the Ashland Board, concluding that the Acquisition Merger described in Section 1.04(b) will qualify as a reorganization under Section 368(a)(1)(A) of the Code; and Miller & Chevalier Chartered delivers a written opinion to Marathon, in form and substance reasonably satisfactory to the Marathon Board, that such Acquisition Merger qualifies as a reorganization under Section 368(a)(1)(A) of the Code. 5. The Closing Agreement provides that the shares of New Ashland Inc. Common Stock distributed to shareholders of HoldCo in the Distribution described in Section 1.04(a) will not be treated as "other property", within the meaning of Section 356(a) of the Code, received in exchange for HoldCo stock in the Acquisition Merger. SECTION 357 6. The Closing Agreement provides that the assumption by Marathon and/or Merger Sub of liabilities of HoldCo in the Acquisition Merger will not be treated as money or other property under Section 357 of the Code. CONTINGENT LIABILITIES 7. The Closing Agreement provides that: (a) HoldCo's basis in its shares of New Ashland Inc. Common Stock will be reduced under Code Section 358(d)(1) as a result of the deemed assumption by New Ashland Inc. of the Ashland Asbestos Liabilities (as defined in the Tax Matters Agreement) and the Ashland Environmental Liabilities (as defined in the Tax Matters Agreement) pursuant to the Conversion Merger either (i) by a specified amount determined as of the Closing that will not exceed $94,000,000 or such greater amount as may be acceptable to Marathon in its sole discretion or (ii) by the estimated present value (computed using a discount rate of no less than seven percent, or such lower rate as is acceptable to Marathon in its sole discretion) of such liabilities, determined as of the Closing. (b) HoldCo's basis in its shares of New Ashland Inc. Common Stock will be reduced under Code Section 358(d)(1) as a result of the Conversion Merger by the estimated present value (computed using a discount rate of no less than seven percent, or such lower rate as is acceptable to Marathon in its sole discretion) of the Ashland Residual Operations Liabilities (as defined in the Tax Matters Agreement) other than the Ashland Asbestos Liabilities and the Ashland Environmental Liabilities, determined as of the Closing. (c) The Ashland Residual Operations Liabilities will not include potential future defense costs of New Ashland Inc. related to the Ashland Residual Operations Liabilities (e.g. attorneys' fees or litigation expenses). (d) The Ashland Residual Operations Liabilities will not include any portion that is reimbursed or reasonably expected to be reimbursed by insurance. (e) The amount of Ashland Asbestos Liabilities and Ashland Environmental Liabilities will be determined (net of the estimated present value of any related insurance recoveries or defense costs) as of the Closing and will not be subsequently redetermined. 8. The Closing Agreement provides that: (a) HoldCo and Marathon or an affiliate of Marathon that is the "acquiring corporation" of HoldCo in the Acquisition Merger within the meaning of Code Section 381(a) (such affiliate the "HoldCo Successor") will be entitled to deduct the Specified Liability Deductions under Code Section 162(a) at the time such liabilities have accrued and economic performance of such liabilities has occurred without regard to whether such deductions exceed the amount of Ashland Residual Operations Liabilities determined for purposes of paragraphs (7)(a) and (b). Such deductions shall be net of amounts reimbursed by insurance or reasonably expected to be reimbursed by insurance. (b) Neither HoldCo, Marathon, nor any member of the Marathon Group (as defined in the Tax Matters Agreement) will have income or gain as a result of New Ashland Inc.'s receipt of insurance recoveries with respect to the Ashland Residual Operations Liabilities to the extent such recoveries are taken into account in determining the amount of the deduction under paragraph (8)(a) above. (c) Neither New Ashland Inc. nor any member of the New Ashland Inc. Group (as defined in the Tax Matters Agreement) will have income or gain as a result of New Ashland Inc.'s receipt of insurance recoveries with respect to the Ashland Residual Operations Liabilities to the extent such recoveries are taken into account in determining the amount of the deduction under paragraph (8)(a) above. (d) Specified Liability Deductions will not be limited under Code Section 382 or 384 or Treas. Reg. ss. 1.1502-15. (e) New Ashland Inc. will be entitled to deduct the defense costs related to the Ashland Residual Operations Liabilities to the extent such defense costs are incurred after Closing and are otherwise deductible. (f) Neither HoldCo, Marathon nor any member of the Marathon Group will realize income or gain as a result of the accrual or payment of the Ashland Residual Operations Liabilities by New Ashland Inc. or by New Ashland Inc.'s payment of the defense costs related to the Ashland Residual Operations Liabilities. PARTNERSHIP 9. Either: (a) The Closing Agreement or a private letter ruling issued by the IRS provides that the MAP Partial Redemption does not constitute a disguised sale of a partnership interest under Section 707(a)(2)(B) of the Code; or (b) If the Closing Agreement or a private letter ruling issued by the IRS does not provide the agreement described in paragraph 9(a) above, Cravath, Swaine & Moore LLP delivers a written opinion to Ashland, in form and substance reasonably satisfactory to the Ashland Board, concluding that the MAP Partial Redemption will not constitute a disguised sale of a partnership interest under Section 707(a)(2)(B) of the Code; and Miller & Chevalier Chartered delivers a written opinion to Marathon, in form and substance reasonably satisfactory to the Marathon Board, concluding that the MAP Partial Redemption does not constitute a disguised sale of a partnership interest under Section 707(a)(2)(B) of the Code. 10. Either: (a) The Closing Agreement or a private letter ruling issued by the IRS provides that the MAP Partial Redemption will not be treated as a sale or exchange of property between Ashland and MAP under Section 751(b) of the Code; or (b) If the Closing Agreement or a private letter ruling issued by the IRS does not provide the agreement described in paragraph 10(a) above, Cravath, Swaine & Moore LLP delivers a written opinion to Ashland, in form and substance reasonably satisfactory to the Ashland Board, concluding that the MAP Partial Redemption will not constitute a sale or exchange of property between Ashland and MAP under Section 751(b) of the Code; and Miller & Chevalier Chartered delivers a written opinion to Marathon, in form and substance reasonably satisfactory to the Marathon Board, concluding that the MAP Partial Redemption does not constitute a sale or exchange of property between Ashland and MAP under Section 751(b) of the Code.

ANNEX N Upon the terms and subject to the conditions set forth in this Agreement, each of the parties shall use its reasonable best efforts to take, or cause to be taken, all actions, and to do, or cause to be done, and to assist and cooperate with the other parties in doing, all things necessary, proper or advisable to cause the Closing to occur on June 30, 2005 or as promptly as practicable thereafter (in accordance with the other terms of this Agreement, including Section 1.05 of this Agreement, which provides that the Closing shall occur on the last business day of a calendar month unless otherwise mutually agreed by Ashland and Marathon), including (i) the obtaining of all necessary actions or nonactions, waivers, consents, orders, authorizations and approvals from Governmental Entities and the making of all necessary registrations, declarations and filings (including filings with Governmental Entities, if any) and the taking of all reasonable steps as may be necessary to obtain an approval or waiver from, or to avoid an action or proceeding by, any Governmental Entity, (ii) the obtaining of all necessary consents, approvals or waivers from third parties, (iii) the defending of any lawsuits or other legal proceedings, whether judicial or administrative, challenging this Agreement or any other Transaction Agreement or the consummation of the Transactions, including seeking to have any stay or temporary restraining order entered by any court or other Governmental Entity vacated or reversed and (iv) the execution and delivery of any additional instruments necessary to consummate the Transactions and to fully carry out the purposes of the Transaction Agreements.

ANNEX O Ashland or New Ashland Inc. shall bear the cost of the St. Paul Park QQQ Project incurred after January 1, 2003 not to exceed $9,350,000 (the "St. Paul Park QQQ Project Payment Amount").

ANNEX P No later than May 15, 2005, Ashland shall provide to Marathon a schedule setting forth estimates, prepared in good faith by Ashland in light of any communications with the Internal Revenue Service (the "IRS"), written or otherwise, of the Ashland Debt Obligation Amounts based on assumed Closing Dates occurring on the last day of each month from June of 2005 through September of 2005.

ANNEX Q SECTION 9.17. Treatment of Ashland Affected Non-Qualified Employee Stock Options or SARs. The Ashland Parties shall take or cause to be taken such actions as are necessary to provide that (i) each Ashland Affected Non-Qualified Employee Stock Option or SAR shall become fully vested as of the Closing and (ii) each Ashland Affected Non-Qualified Employee Stock Option or SAR and each Ashland Non-Qualified Employee Stock Option or Ashland SAR granted to an employee of MAP or any of its subsidiaries that is outstanding and has vested and is exercisable but remains unexercised immediately prior to the Closing shall remain exercisable until the expiration of the 90-day period immediately following the Closing Date, in each case with the same reduction in the exercise price therefor as shall be applicable to Ashland Non-Qualified Employee Stock Options or Ashland SARs granted to employees of Ashland, as a result of the consummation of the Transactions. The parties hereto intend that the foregoing shall be accomplished in a manner consistent with good faith compliance with the requirements of Section 409A of the Code.

ANNEX R (b) by either Ashland or Marathon: (i) if the Transactions are not consummated during the period ending on September 30, 2005 (the "Outside Date"), unless the failure to consummate the Transactions is the result of a material breach of the Transaction Agreements by the party seeking to terminate this Agreement;

ANNEX S "MAP Adjustment Amount" means 38% of the Distributable Cash of MAP (as such term is defined in the MAP LLC Agreement) as of the close of business on the Closing Date plus 38% of the amount of any Qualified Expenditure (as such term is defined in Amendment No. 1 dated as of March 17, 2004 to the MAP LLC Agreement) actually paid by MAP on or prior to the Closing Date, for which MAP has not received payment from Marathon under the Project Loan Agreement Detroit Refinery Expansion Project dated as of March 17, 2004; provided, however, that for purposes of this Agreement, the existing lease with Air Products and Chemicals, Inc. dated January 20, 2003, as amended, relating to the supply of hydrogen to the Catlettsburg refinery and the existing leases acquired from Ultramar Diamond Shamrock Corporation ("UDS") in connection with the 1999 acquisition of certain marketing and logistics assets of UDS located in the State of Michigan shall not be treated as Ordinary Course Debt (as such term is defined in the MAP LLC Agreement).

                                                               EXHIBIT 2.2

                                                               CONFORMED COPY


                         AMENDED AND RESTATED TAX MATTERS  AGREEMENT  dated
                    as of April 27, 2005 (the "TMA" or  "Agreement")  among
                    Ashland Inc., a Kentucky corporation  ("Ashland"),  ATB
                    Holdings, Inc., a Delaware corporation ("HoldCo"),  EXM
                    LLC, a Kentucky limited liability company ("New Ashland
                    LLC"),  New EXM  Inc.,  a  Kentucky  corporation  ("New
                    Ashland Inc."),  Marathon Oil Company,  an Ohio Company
                    ("Marathon  Company"),   Marathon  Oil  Corporation,  a
                    Delaware  corporation  ("Marathon"),  Marathon Domestic
                    LLC,  a Delaware  limited  liability  company  ("Merger
                    Sub") and Marathon  Ashland  Petroleum  LLC, a Delaware
                    limited liability company owned by Marathon Company and
                    Ashland ("MAP").


                  WHEREAS,  Ashland is the common  parent of an  affiliated
group of  domestic  corporations  that  has  elected  to file  consolidated
Federal income tax returns.

                  WHEREAS,  Marathon is the common  parent of an affiliated
group of  domestic  corporations  that  has  elected  to file  consolidated
Federal income tax returns (the "Marathon Affiliated Group").

                  WHEREAS,  Ashland and Marathon  Company,  a  wholly-owned
subsidiary of Marathon,  own all the limited liability company interests in
MAP, which is treated for Federal income tax purposes as a partnership.

                  WHEREAS,  Ashland  and  Marathon  and  certain  of  their
respective  related parties have entered into the Master Agreement pursuant
to which they have agreed to engage in the transactions contemplated by the
Transaction  Agreements  and the Ancillary  Agreements,  as those terms are
defined in the Master Agreement (collectively, the "Transactions").

                  WHEREAS, as part of the Transactions,  HoldCo will become
the  common  parent of the  Ashland  Affiliated  Group in a series of steps
which are intended to qualify as a reorganization described in Code Section
368(a)(1)(F) (the "F Reorganization").

                  WHEREAS,  as part of the F  Reorganization,  Ashland will
contribute  its Membership  Interest and the Acquired  Businesses to HoldCo
and will  merge  with and into New  Ashland  LLC,  which  will  assume  all
obligations of Ashland, including the obligations of Ashland under this TMA
(the "F Reorganization Merger").

                  WHEREAS,  as part of the Transactions,  MAP will redeem a
portion of Ashland's interest in MAP in exchange for a distribution of cash
and MAP accounts receivable, as set forth in the Master Agreement (the "MAP
Partial Redemption").

                  WHEREAS,  as part of the  Transactions,  New  Ashland LLC
will  merge  with  and  into  New  Ashland  Inc.,  which  will  assume  all
obligations of New Ashland LLC,  including the obligations that New Ashland
LLC assumed from Ashland (the "Conversion Merger").

                  WHEREAS,  as part of the  Transactions,  (i) HoldCo  will
distribute, to the former holders of the stock of Ashland, all the stock of
New Ashland  Inc. in a  transaction  intended to qualify as a  distribution
described in Code Section 355 (the  "Spinoff"),  and (ii) HoldCo will merge
with  and  into  Merger  Sub in a  transaction  intended  to  qualify  as a
reorganization  described in Code Section  368(a)(1)(A)  (the  "Acquisition
Merger") and as a result of such merger, HoldCo will cease to exist.

                  WHEREAS after the Acquisition Merger,  Marathon may cause
Merger Sub to  contribute  all or a portion  of the assets and  liabilities
that it acquired in the  Acquisition  Merger to a newly formed  corporation
that is a wholly-owned,  direct subsidiary of Merger Sub or,  alternatively
Marathon  may  contribute  Merger  Sub  to  a  wholly-owned  subsidiary  of
Marathon.

                  WHEREAS,  immediately after the Spinoff, New Ashland Inc.
will be the common parent of an affiliated  group of domestic  corporations
that elects to file consolidated Federal income tax returns, which will not
include HoldCo (the "New Ashland Inc. Affiliated Group").

                  WHEREAS  the  parties  to this TMA wish to  allocate  and
assign  certain  Tax  responsibilities,   liabilities  and  benefits  among
themselves and to provide for certain other Tax matters.

                  WHEREAS  the parties  entered  into the  original  TMA on
March 18, 2004.

                  WHEREAS the parties have entered into  Amendment No. 1 to
the Master  Agreement,  dated April 27, 2005 ("Amendment No. 1"),  amending
certain terms of the Master Agreement.

                  WHEREAS  the  parties  wish to amend and  restate  in its
entirety this TMA.

                  NOW, THEREFORE,  in consideration of the mutual covenants
and agreements contained in this TMA, the parties agree as follows:

                                 ARTICLE I

                                Definitions

                  As used in this Agreement, the following terms shall have
the following meaning:

                  "Acquired Businesses" means the "Maleic Business" and the
"VIOC Centers", as each such term is defined in the Master Agreement.

                  "Acquisition  Merger"  has the  meaning  set forth in the
ninth WHEREAS clause of this TMA.

                  "affiliate" has the meaning  ascribed to such term in the
Master Agreement.

                  "affiliated   group"   means  an   affiliated   group  of
corporations  within the  meaning of Code  Section  1504(a) for the taxable
period in question.

                  "Ashland  Affiliated Group" means the affiliated group of
domestic  corporations that has elected to file consolidated Federal income
tax returns of which Ashland (and immediately  after the F  Reorganization,
HoldCo) is the common parent.

                  "Ashland  Group"  means  (i) the  corporations  that  are
members of the  Ashland  Affiliated  Group and (ii) the  corporations  that
would be members of the Ashland Affiliated Group but for the fact that they
are not includible corporations under Code Section 1504(b).

                  "Ashland  Asbestos  Liabilities"  means any obligation of
Ashland or any of its  present or former  subsidiaries  (including  but not
limited to Riley Stoker Inc.)  relating to claims made at any time that are
attributable  to  allegations  of  exposure  to  asbestos  on or before the
Closing Date with respect to Residual  Business  Operations,  to the extent
that New Ashland Inc. or any member of the New Ashland Inc. Group is liable
for such obligation after the Closing Date.

                  "Ashland Employee  Liabilities"  means (i) any obligation
of Ashland or any of its present or former  subsidiaries  for any  Employee
Benefit  Obligation  to be  provided  to or on behalf of  present or former
employees  of  Ashland  or any  such  subsidiaries  for  services  that are
attributable to Residual Business  Operations or to the HoldCo  Businesses,
in each case that are  performed  on or before  the  Closing  Date,  to the
extent that New Ashland Inc. or any member of the New Ashland Inc. Group is
liable for such  obligation  after the Closing Date and (ii) any obligation
pursuant to the  exercise of any Option by any current or former  employees
of HoldCo  Businesses or Residual  Business  Operations with respect to the
capital stock of Ashland, HoldCo or New Ashland Inc.

                  "Ashland Environmental  Liabilities" means any obligation
of Ashland or any of its present or former subsidiaries  relating to claims
made at any  time for  environmental  damages  or  remediation  or  similar
expenses arising from acts,  omissions or conditions  occurring or existing
on or before the Closing Date that are  attributable  to Residual  Business
Operations or to the HoldCo Businesses, to the extent that New Ashland Inc.
or any member of the New Ashland Inc.  Group is liable for such  obligation
after the Closing Date.

                  "Ashland  Residual  Operations   Liabilities"  means  any
obligation of Ashland or any of its present or former  subsidiaries that is
attributable to Residual Business  Operations or to the HoldCo  Businesses,
including but not limited to Ashland Asbestos Liabilities, Ashland Employee
Liabilities and Ashland  Environmental  Liabilities,  but shall not include
any  associated  defense  costs  incurred  by New  Ashland  Inc.  after the
Closing.

                  "Bankruptcy Event" means, with respect to any Person, the
occurrence or existence of any of the following events or conditions:  such
Person (1) is dissolved  (other than the  dissolution  of a  transferor  in
connection  with a  transfer  to a  successor  as  contemplated  by Section
10.15); (2) admits in writing its inability generally to pay its debts; (3)
makes a general assignment for the benefit of its creditors; (4) institutes
or has instituted  against it a proceeding seeking a judgment of insolvency
or bankruptcy or any similar  relief under any bankruptcy or insolvency law
or  other  similar  law  affecting  creditors'  rights,  or a  petition  is
presented  for its winding up or  liquidation  and, in the case of any such
proceeding or petition  instituted or presented against it, such proceeding
or petition (A) results in a judgment of  insolvency  or  bankruptcy or the
entry of an order  for  similar  relief  or the  making of an order for its
winding up or liquidation  or (B) is not dismissed or discharged  within 60
days of the institution or filing thereof;  (5) has a resolution  passed by
its Board of Directors  for its winding up or  liquidation  (other than the
winding up or liquidation of a transferor in connection  with a transfer to
a successor as contemplated by Section 10.15);  (6) consents to, or becomes
subject  to an order or  judgment  providing  for,  the  appointment  of an
administrator,  receiver,  trustee, custodian or other similar official for
it or for all or substantially  all its assets and, in the case of an order
or judgment, such judgment or order is not dismissed, discharged, stayed or
restrained  in each  case  within  sixty  (60)  days of the entry or making
thereof;  or (7) takes any action in furtherance of, or expressly indicates
its consent to, approval of, or acquiescence in, any of the foregoing.

                  "Bankruptcy  Party" has the  meaning set forth in Section
8.02(c) of this TMA.

                  "Bankruptcy  Tax  Claims"  has the  meaning  set forth in
Section 8.02(c) of this TMA.

                  "Basket  One Amount" has the meaning set forth in Section
5.02(b)(i) of this TMA.

                  "Basket  One Cap" has the  meaning  set forth in  Section
5.02(b)(ii)(C) of this TMA.

                  "Basket One Cap Base Amount" has the meaning set forth in
Section 5.02(b)(ii)(C).

                  "Basket One Cap  Carryforward"  has the meaning set forth
in Section 5.02(b)(ii)(C) of this TMA.

                  "Basket  One  Deductions"  has the  meaning  set forth in
Section 5.02(b)(ii)(B) of this TMA.

                  "Basket  One Tax  Rate"  has the  meaning  set  forth  in
Section 5.02(b)(ii)(A) of this TMA.

                  "Basket  Two Amount" has the meaning set forth in Section
5.02(c)(i) of this TMA.

                  "Basket  Two  Carryovers"  has the  meaning  set forth in
Section 5.02(c)(ii)(B) of this TMA.

                  "Basket  Two  Deductions"  has the  meaning  set forth in
Section 5.02(c)(ii)(A) of this TMA.

                   "Closing"  and Closing Date" have the meanings set forth
in the Master Agreement.

                  "Closing  Agreement"  means the closing  agreement  to be
entered into by  Marathon,  Ashland,  New Ashland Inc. and certain  related
parties  and the IRS with  respect  to the  Transactions  pursuant  to Code
Section 7121 and  described  in Section 5.01 of this Tax Matters  Agreement
received by Ashland and  Marathon  with respect to the  Transactions  on or
before the Closing Date.

                  "Code"  means  the  Internal  Revenue  Code of  1986,  as
amended.

                  "Conversion  Merger"  has the  meaning  set  forth in the
eighth WHEREAS clause of this TMA.

                  "Detroit  Facility"  means MAP's $325  million  borrowing
facility  provided by  Marathon  Company as lender,  the  proceeds of which
facility are used for the sole  purpose of funding an  expansion  and clean
fuels modification project at MAP's Detroit refinery.

                  "Employee   Benefit   Obligation"  means  any  obligation
(whether  current or deferred)  for any  compensation,  pension,  severance
payment,  medical,  retirement or disability benefit, life insurance or any
similar employee benefit.

                  "Escrow"  means  the  escrow  created  under  the  Escrow
Agreement.

                  "Escrow  Agreement"  has the meaning set forth in Section
6.02(a) of this TMA.

                  "Escrow  Threshold"  has the meaning set forth in Section
6.02(c)(i)(B) of this TMA.

                  "Excess Section 355(e) Taxes" means the excess, if any of
the total amount of Section 358(d)(1) Adjustment Taxes over $75 million.

                   "Extraordinary  Events"  means  (i)  unforeseen  funding
requirements  resulting  from damage to MAP  properties by storm,  fire, or
similar  catastrophic  events,  or (ii)  unforeseen  expenditures  that are
mandated by law, regulation or administrative ruling, in each case that are
promulgated after the Closing Date.

                  "F  Reorganization  Merger"  has the meaning set forth in
the sixth WHEREAS clause of this TMA.

                  "Federal Tax Benefit  Payments" has the meaning set forth
in Section 5.02(a)(i) of this TMA.

                  "Final  Determination"  means  the  final  resolution  of
liability  for any Tax for any  taxable  period by or as a result of: (i) a
final and  unappealable  decision,  judgment,  decree or other order by any
court of competent jurisdiction; (ii) a final closing agreement (other than
the Closing  Agreement) or accepted offer in compromise under Code Sections
7121 or  7122,  or a  comparable  agreement  under  the  laws of any  other
jurisdiction,  which  resolves  the  entire  Tax  liability  for the entire
taxable  period;  (iii) a duly  executed  IRS  Form 870 or  870-AD  (or any
successor  forms  thereto),  on the date  such form is  effective,  or by a
comparable form under the laws of other  jurisdictions;  except that a Form
870 or 870-AD or comparable form that reserves  (whether by its terms or by
operation  of law) the right of the  taxpayer  to file a claim  for  Refund
and/or the right of the Tax Authority to assert a further  deficiency shall
not constitute a Final Determination with respect to the right so reserved;
(iv) any  allowance of a Refund or credit in respect of an  overpayment  of
such Tax, but only after the  expiration  of all periods  during which such
Refund may be recovered  (including  by way of offset) by the  jurisdiction
imposing such Tax; (v) the execution of a closing agreement with respect to
a pre-filing  agreement  described in Rev. Proc. 2001-22, or (vi) any other
final disposition by reason of the expiration of the applicable  statute of
limitations or by mutual agreement of the parties hereto.

                  "Fully  Funded"  has the  meaning  set  forth in  Section
6.02(c)(i)(A) of this TMA.

                  "HoldCo Businesses" means the Acquired Businesses and the
JV Interests.

                  "Income  Taxes" means any Taxes  imposed on or determined
by  reference  to gross or net income or  profits  or any other  measure of
income or profits.

                  "Independent Entity" has the meaning set forth in Section
9.01 of this TMA.

                  "Inflation  Factor"  means the U.S.  GDP  Implicit  Price
Deflator,  which  shall be applied  annually  to adjust  prices to constant
dollar  amounts  beginning with the calendar year following the year of the
Closing Date.

                  "IRS" means the U.S. Internal Revenue Service.

                  "JV Interests"  means the  "Membership  Interest" and the
"LOOP/LOCAP  Interests",  as  each  such  term  is  defined  in the  Master
Agreement.

                  "JV  Entities"  means the  entities  wholly or  partially
owned, directly or indirectly, through the ownership of the JV Interests.

                  "MAP  LLC  Agreement"  means  the  Amended  and  Restated
Limited  Liability Company Agreement of MAP, dated as of December 31, 1998,
as amended to the date of this TMA.

                  "Marathon  Affiliated Group" has the meaning set forth in
the second WHEREAS clause of this TMA.

                  "Marathon  Group"  means  (i) the  corporations  that are
members of the Marathon  Affiliated  Group and (ii) the  corporations  that
would be members  of the  Marathon  Affiliated  Group but for the fact that
they are not includible corporations under Code Section 1504(b),  including
in both cases,  beginning on the day after the Closing Date, former members
of the Ashland Group that become members of the Marathon Group by reason of
the Acquisition Merger.

                  "Marathon  Portion"  has the meaning set forth in Section
2.05 of this TMA.

                  "Marathon  Tax Matter" means any Tax Item arising from or
related to the  ownership or  operation of HoldCo or the HoldCo  Businesses
attributable to a Post-Closing Period.

                  "Master Agreement" means the Master Agreement dated as of
March 18, 2004, among Ashland,  HoldCo,  New Ashland LLC, New Ashland Inc.,
Marathon, Marathon Company, Merger Sub and MAP, as amended by Amendment No.
1.

                  "Net Deduction  Method" means,  with respect to Specified
Liability Deductions, the deduction of such amounts as they are accrued and
recognized  under the  accrual  method  of  accounting,  net of actual  and
anticipated  insurance  recoveries  determined  under the accrual method of
accounting, in each case applied consistently from year to year.

                  "New Ashland Inc.  Affiliated  Group" has the meaning set
forth in the eleventh WHEREAS clause of this TMA.

                  "New Ashland Inc. Group" means (i) the corporations  that
are  members  of the  New  Ashland  Inc.  Affiliated  Group  and  (ii)  the
corporations that would be members of the New Ashland Inc. Affiliated Group
but for the fact  that  they are not  includible  corporations  under  Code
Section 1504(b).

                  "New Ashland  Inc.  Portion" has the meaning set forth in
Section 2.05 of this TMA.

                  "New  Ashland  Inc.  Tax  Matter"  means any Tax Item (i)
arising  during  a  Pre-Closing  Period  or  (ii)  from  or  related  to  a
Post-Closing Period that is not a Marathon Tax Matter.

                  "Non-Bankruptcy  Party"  has the  meaning  set  forth  in
Section 8.02(c) of this TMA.

                  "Non-Federal  Tax  Benefit  Payment"  has the meaning set
forth in Section 5.02(a)(i) of this TMA.

                   "Option"  means any  compensatory  stock  option,  stock
appreciation right, restricted stock or similar instrument.

                  "Other Taxes" means any Taxes other than Income Taxes.

                  "Pass-Though  Items"  mean any Tax Items  that are passed
through to, and reportable on the Tax Returns of, one or more of the owners
of MAP or any other JV Entity  and that  could  result  in an  increase  or
decrease in any such owner's liability for Taxes.

                  "Post-Closing  Period" means any taxable  period,  and in
the case of a Straddle  Period the  portion of any such  period,  beginning
after the Closing Date.

                  "Pre-Closing   Period"  means  the  Pre-Closing   Taxable
Periods, and the portion of any Straddle Period ending on the Closing Date.

                  "Pre-Closing  Taxable  Period"  means any taxable  period
ending on or before the Closing Date.

                  "Refund"  means  any  refund  of  Taxes,   including  any
reductions  of  Taxes  paid or  payable  by means of  credits,  offsets  or
otherwise.

                  "Residual  Business  Operations"  means  former  business
operations of Ashland or any current or former member of the Ashland Group,
in each case determined as of the date of this Agreement,  that will not be
transferred or deemed to be transferred to New Ashland Inc. pursuant to the
Conversion Merger.

                  "Section  355(e) Tax Claim" has the  meaning set forth in
Section 8.02(e) of this TMA.

                  "Section  355(e)  Taxes" means any Taxes,  arising in any
taxable  period,  resulting from the  application of Code Section 355(e) or
any similar  provision  under state or local law to the Spinoff,  including
any Taxes  attributable  to an  adjustment to the tax basis of the stock of
New Ashland Inc. resulting from any audit by any Tax Authority or any Final
Determination.

                  "Section  355(e)  Schedule"  has the meaning set forth in
Section 3.07(a) of this TMA.

                  "Section 358(d)(1) Adjustment" means the reduction in the
tax basis of New Ashland Inc. stock under Section 358(d)(1)  resulting from
the  assumption  by New Ashland  Inc. of the  Ashland  Residual  Operations
Liabilities pursuant to the Conversion Merger.

                  "Section 358(d)(1)  Adjustment Taxes" means, with respect
to any  calculation of Section 355(e) Taxes the excess,  if any, of (i) any
such Section  355(e) Taxes over (ii) the amount of any such Section  355(e)
Taxes that would exist if the Section 358(d)(1) Adjustment were $0.

                  "Specified Liability Deductions" means the amount, in any
taxable  period,  allowable as deductible  expenses for Federal  income tax
purposes  in respect  of Ashland  Residual  Operations  Liabilities  (after
applying the  applicable  limitations,  if any, under Code Sections 382 and
384 and Treasury Regulation Section 1.1502-15).

                  "Spinoff"  has the meaning set forth in the ninth WHEREAS
clause of this TMA.

                  "Straddle Period" means any taxable period that includes,
but does not end on, the Closing Date.

                  "subsidiary" has the meaning ascribed to such term in the
Master Agreement.

                  "Tax" or "Taxes"  means all forms of taxation  imposed by
any  federal,   state,  local  or  foreign   jurisdiction   (including  any
subdivision  and any  revenue  agency  of such a  jurisdiction),  including
without limitation net income, gross income,  alternative  minimum,  sales,
use, ad valorem, gross receipts, value added, franchise, license, transfer,
withholding,  payroll,  employment,  excise,  severance,  stamp,  property,
custom  duty,  taxes or  governmental  charges,  together  with any related
interest,  penalties or other  additional  amounts  imposed by any federal,
state,  local or foreign  jurisdiction  (including any  subdivision and any
revenue agency of such a jurisdiction),  and including all liability for or
in  respect  of any of the  foregoing  as a result  of being a member  of a
consolidated  or  similar  group or a  partner  in an entity  treated  as a
partnership or other pass-through entity for Tax purposes or as a result of
any tax sharing or similar contractual agreement.

                  "Tax  Authority"  means  any  federal,  state,  local  or
foreign  jurisdiction  (including any subdivision and any revenue agency of
such a jurisdiction)  imposing Taxes and the agency,  if any,  charged with
the collection of such Taxes for such authority.

                  "Tax Benefit" means any item of loss, deduction,  credit,
or any other Tax Item that decreases Taxes paid or payable.

                  "Tax  Benefit  Payments"  has the  meaning  set  forth in
Section 5.02(a)(i) of this TMA.

                  "Tax Certificate" means any letter or certificate that is
referred to in, and forms a basis for, a Tax Opinion.

                  "Tax   Claim"  has  the  meaning  set  forth  in  Section
8.02(a)(i) of this TMA.

                  "Tax Detriment" means any item of income, gain, recapture
of credit or any other Tax Item that  increases  Taxes paid or payable,  or
any reduction in or limitation  of, any Tax Item due to the  application of
Code Sections 382, 384 or Treasury Regulation Section 1.1502-15.

                  "Tax  Item"  means  any  item  of  income,   gain,  loss,
deduction,  credit,  recapture of credit,  or other similar item,  that may
have the  effect  of  increasing  or  decreasing  any Tax paid or  payable,
including  any  adjustment  to  tax  basis,  capitalized  interest  or  any
adjustment under Code Section 481.

                  "Tax Loss"  means the  increase in Tax paid or payable to
the relevant Tax Authority (or, without  duplication,  the reduction in any
Refund) attributable to a Tax Detriment.

                  "Tax  Opinion"  means the  opinions of Cravath,  Swaine &
Moore LLP and  Miller &  Chevalier  Chartered  concerning  certain  Federal
income tax issues  related to the  Transactions  to be delivered to Ashland
and  Marathon,  respectively,  pursuant  to Section  10.01(f) of the Master
Agreement.

                  "Tax  Return"  means any return,  filing,  questionnaire,
information  statement,  or other document required to be filed,  including
amended  returns  that may be filed for any period or portion  thereof with
any Tax Authority in  connection  with any Tax (whether or not a payment is
required to be made with respect to such filing).

                  "Tax  Savings"  means the decrease in Tax paid or payable
to the relevant Tax Authority (or, without duplication, the increase in any
Refund) attributable to a Tax Benefit.

                  "Tax Structure" means the manner,  order or form in which
the  Transactions  (currently  as  contemplated  or as amended prior to the
Closing) are effected  pursuant to the Master  Agreement or any Transaction
Agreement.

                  "Transactions"  has the  meaning  set forth in the fourth
WHEREAS clause of this TMA.

                  "Transaction  Taxes"  means  Taxes,  other than  Transfer
Taxes and Section 355(e) Taxes,  of any member of the Ashland Group for any
Pre-Closing  Period or the New Ashland Inc. Group or the Marathon Group for
any  taxable  period  resulting  from,  or arising in  connection  with any
portion of the Transactions.

                  "Transfer  Taxes"  has the  meaning  set forth in Section
2.03 of this TMA.

                  "Valvoline" means the active trade or business  conducted
by  the  business  division  of  Ashland  (and  immediately  following  the
Transactions, of New Ashland Inc.) of the same name.

                  All  capitalized  terms used but not  defined in this TMA
shall have the meanings ascribed to such terms in the Master Agreement.

                                ARTICLE II

                         Indemnification for Taxes

                  SECTION 2.01. General. (a) Indemnification by New Ashland
Inc. Except as otherwise  provided in Sections 2.03,  2.04,  2.05, 2.06 and
Articles V and VI of this TMA,  New Ashland Inc. and each member of the New
Ashland Inc. Group shall be liable for, shall  indemnify each member of the
Marathon  Group  against,  and shall be  entitled  to all  Refunds of, less
reasonable  out-of-pocket  costs and expenses  incurred in connection  with
such Refund,  (i) all Taxes for all  Pre-Closing  Periods of each member of
the  Ashland  Group  and the  Acquired  Businesses;  (ii) all Taxes for all
Post-Closing  Periods that are imposed on or  collected  from any member of
the Marathon  Affiliated  Group as a transferee  of or successor to HoldCo,
pursuant to any law, rule or regulation,  imposed on taxable income or gain
that is attributable,  in whole or in part, to events or transactions  that
occur on or before the Closing Date but that is recognized for tax purposes
in  a  Post-Closing  Period  as a  result  of  the  installment  method  of
accounting, completed contract method of accounting, the long-term contract
method of accounting,  the recapture of a dual consolidated  loss,  Section
481 of the Code (other than any such Taxes imposed by reason of a change in
accounting method by HoldCo or a successor to HoldCo made or applied for by
Marathon or a Member of the Marathon  Group after the Closing Date,  unless
such  change was  contemplated  by this TMA,  or made or applied for by New
Ashland Inc. or a member of the New Ashland Inc. Group, or made by Marathon
with  New  Ashland  Inc.'s  consent,  or  required  as a  condition  of the
Transactions by the Closing Agreement or otherwise), or other provisions of
Federal, state, local or foreign tax law that have a similar effect and all
Taxes  attributable  to the adoption by HoldCo of the Net Deduction  Method
with respect to  Specified  Liability  Deductions;  (iii) all Taxes for all
taxable  periods of each member of the New  Ashland  Inc.  Group;  (iv) all
Taxes imposed on any member of the Marathon Group with respect to insurance
recoveries  received by any member of the New Ashland  Inc.  Group that are
attributable to Residual Business  Operations;  (v) all Taxes for which any
current or former member of the Ashland Group or the New Ashland Inc. Group
is liable under  Treasury  Regulation  Section  1.1502-6 (or any  analogous
provision  of state,  local or  foreign  law);  (vi) all Taxes  payable  by
Ashland or HoldCo that are attributable to Pass-Through Items of MAP or any
other  JV  Entity  with  respect  to  any  Pre-Closing  Period;  (vii)  all
Transaction  Taxes; and (viii) all Tax Losses of any member of the Marathon
Group  resulting from the failure by any member of the Ashland Group or the
New Ashland Inc. Group, as the case may be, to use a consistent position as
described in the last sentence of Section 3.04 of this TMA.

                  (b)  Indemnification  by  Marathon.  Except as  otherwise
provided in Sections 2.03,  2.04,  2.05, 2.06 and Articles V and VI of this
TMA,  Marathon and each member of the  Marathon  Group shall be liable for,
and shall indemnify each member of the New Ashland Inc. Group against,  and
shall be entitled to all Refunds of, less  reasonable  out-of-pocket  costs
and expenses incurred in connection with such Refund, (i) all Taxes for all
taxable  periods  of each  member of the  Marathon  Group,  other than as a
successor to or  transferee  of a former  member of the Ashland  Affiliated
Group by  reason  of the  Acquisition  Merger,  and (ii) all  Taxes for all
taxable periods that are imposed on and payable by MAP or any JV Entities.

                  SECTION  2.02.   Apportionment   of  Items  for  Straddle
Periods.  (a) Taxes. Taxes and Refunds of any entity or with respect to the
Acquired  Businesses for any Straddle  Period shall be apportioned  between
the  Pre-Closing  Period  and the  Post-Closing  Period  on the  basis of a
"closing of the books" as of the end of the  Closing  Date,  provided  that
Other  Taxes  that are not based on  revenues,  sales or a similar  measure
shall be apportioned  between the Pre-Closing  Period and the  Post-Closing
Period based on the number of days of the relevant  taxable period that are
in the Pre-Closing Period and the Post-Closing Period respectively.

                  (b)  Apportionment  of  Pass-Through  Items  of  MAP  and
certain other JV Entities. For purposes of determining the Taxes payable by
the owner of a JV  Interest  in MAP or any other JV Entity  that is treated
for purposes of the relevant Tax as a pass-through entity, the Pass-Through
Items  for any  Straddle  Period  of such JV  Entity  shall be  apportioned
between the Pre-Closing Period and the Post-Closing  Period on the basis of
a "closing  of the books" as of the end of the Closing  Date in  accordance
with  Code   Section   706(c)(2)(A)   and   Treasury   Regulation   Section
1.706-1(c)(2)(i)  (or corresponding  principles of state,  local or foreign
laws,  rules or  regulations);  provided that Other Taxes of MAP or such JV
Entity that are not based on revenues,  sales or a similar measure shall be
apportioned  between the Pre-Closing and the  Post-Closing  Period based on
the  number  of  days  of  the  relevant  taxable  period  that  are in the
Pre-Closing Period and the Post-Closing Period respectively.

                  SECTION 2.03.  Transfer Taxes.  New Ashland Inc. shall be
liable for, shall indemnify each member of the Marathon Group against,  and
shall be entitled to retain all Refunds of, less  reasonable  out-of-pocket
costs and expenses  incurred in connection with such Refund,  all transfer,
documentary,  sales,  use,  registration and similar Taxes and related fees
incurred  in  connection  with  the  Transactions  (collectively  "Transfer
Taxes").  New Ashland  Inc.,  with  Marathon's  cooperation,  shall  timely
prepare  and file all Tax  Returns  relating  to  Transfer  Taxes as may be
required to comply with the provisions of such Tax laws.

                  SECTION 2.04. Certain  Transaction Taxes.  Marathon shall
be liable for,  shall  indemnify  each member of the New Ashland Inc. Group
against,  and shall be entitled  to retain all Refunds of, less  reasonable
out-of-pocket  costs and expenses  incurred in connection with such Refund,
any  Transaction  Taxes  to  the  extent  that  such  Taxes  are  primarily
attributable to:

                  (a) any inaccurate, written representation or warranty of
         fact or intent  specifically  made by, or specifically  attributed
         to, any member of the  Marathon  Group  (other than HoldCo) in the
         Closing  Agreement or a Tax  Certificate  and that is specified on
         Schedule 2.04 attached hereto (as amended from time to time by the
         unanimous agreement of Marathon and Ashland).

                  (b) any breach by any member of the  Marathon  Group of a
         covenant in Section 7.03(b) of this TMA,

unless such  Transaction  Taxes would have been imposed  without  regard to
such inaccuracy or breach.


                  SECTION 2.05.  Section 355(e) Taxes.  With respect to any
estimate   or   any   other    calculation   of   Section   355(e)   Taxes,

                  (a) The "Marathon  Portion" of such Section  355(e) Taxes
         means:

                       (i) 100% of the Section 355(e) Taxes in excess of $0
         and to and  including  the  sum of (A)  $200  million  and (B) all
         Excess Section 355(e) Taxes; and

                       (ii) 50% of the  Section  355(e)  Taxes in excess of
         the sum of (A) $375  million  and (B) all  Excess  Section  355(e)
         Taxes.

                  (b) The "New Ashland Inc. Portion" of such Section 355(e)
         Taxes means:

                       (i) 100% of the  Section  355(e)  Taxes in excess of
         the  amount  included  in  the  Marathon   Portion  under  Section
         2.05(a)(i)  and to and  including  the sum of (A) $375 million and
         (B) all Excess Section 355(e) Taxes; and

                       (ii) 50% of the  Section  355(e)  Taxes in excess of
         the sum of (A) $375  million;  and (B) all Excess  Section  355(e)
         Taxes.

                  (c) Marathon and each member of the Marathon  Group shall
         be liable for, and shall  indemnify each member of the New Ashland
         Inc. Group  against,  and shall be entitled to all Refunds of, the
         Marathon Portion of all Section 355(e) Taxes. New Ashland Inc. and
         each member of the New Ashland Inc. Group shall be liable for, and
         shall  indemnify each member of the Marathon  Group  against,  and
         shall be entitled to all Refunds of, the New Ashland Inc.  Portion
         of the Section 355(e) Taxes.

                  SECTION 2.06.  Gain  Recognition  Agreement  Taxes.  Each
member of the New Ashland  Inc.  Group  shall  comply with the terms of any
Section  367  "gain  recognition  agreement"  executed  by a member  of the
Ashland Group during a Pre-Closing Period,  including,  without limitation,
by including  the gain, if any,  required to be recognized  pursuant to the
terms  of any  such  agreement  (or by  virtue  of the  application  of any
provision of Treasury Regulation Section 1.367(a)-8) and the payment of any
Tax that is required to be paid  pursuant  to Treasury  Regulation  Section
1.367(a)-8(b)(3).  If a Tax  Authority  determines  that any  member of the
Ashland  Group or the New Ashland Inc.  Group has failed to comply with the
terms of any such agreement or any provision of Treasury Regulation Section
1.367(a)-8,  the New Ashland Inc.  Group shall be liable for any  resulting
liability  for Taxes and each  member of the New Ashland  Inc.  Group shall
indemnify each member of the Marathon Group against any such Tax liability.

                                ARTICLE III

                   Preparation and Filing of Tax Returns

                  SECTION  3.01.  Preparation  and Filing of  Original  Tax
Returns. (a) Ashland (before the F Reorganization  Merger), and New Ashland
Inc. LLC and New Ashland Inc. (after the F  Reorganization  Merger),  shall
prepare and file, or cause to be prepared and filed, all Tax Returns (i) of
each member of the Ashland Group  (including any Tax Returns related to the
Acquired  Businesses) for all Pre-Closing  Periods,  (ii) of each member of
the New Ashland  Inc.  Group for all  taxable  periods and (iii) that it is
required to file pursuant to Section 3.02. Ashland and New Ashland Inc., as
the case may be,  shall  timely  pay all  Taxes  with  respect  to such Tax
Returns.

                  (b)  Marathon  shall  prepare  and  file,  or cause to be
prepared  and filed,  all Tax Returns (i) of former  members of the Ashland
Group and  successors  thereof that become members of the Marathon Group by
reason of the Acquisition Merger for all Post-Closing Periods, (ii) of each
other member of the Marathon Group for all taxable periods,  and (iii) that
it is required to prepare and file pursuant to Section 3.02. Marathon shall
timely pay all Taxes with respect to such Tax Returns.

                  (c) MAP shall  prepare and file,  or cause to be prepared
and filed,  all Tax Returns of MAP and its subsidiaries for any Pre-Closing
Period and any Straddle Period,  and such Tax Returns shall be prepared and
filed in a manner  consistent with past practice and in accordance with the
MAP LLC  Agreement as in effect  immediately  prior to the  Closing.  On or
before August 15, 2005, MAP shall provide to New Ashland Inc. (i) the final
IRS  Schedule  K-1 with  respect  to the  taxable  year for MAP  ending  on
December  31,  2004;  and (ii) a pro forma IRS Schedule K-1 with respect to
the taxable year or portion thereof ending on the Closing Date, showing the
estimated  Pass-Through  Items that will be  apportioned to Ashland for the
Pre-Closing  Period. In addition,  on or before February 1, 2006, MAP shall
provide to New Ashland  Inc. the final IRS Schedule K-1 with respect to the
taxable year for MAP ending on the Closing Date.

                  SECTION 3.02. Straddle Period Tax Returns.  (a) Following
the Closing  Date,  Marathon and New Ashland Inc.  shall meet and prepare a
written schedule that allocates the responsibility for preparing and filing
Straddle  Period Tax Returns in each  jurisdiction of former members of the
Ashland Group and  successors  thereof that become  members of the Marathon
Group by reason of the  Acquisition  Merger.  If the  parties are unable to
agree,  the party with the most substantial  presence in the  jurisdiction,
taking into  account  their  respective  assets or  businesses,  shall have
preparation and filing responsibility. If Marathon and New Ashland Inc. are
not able to agree upon the party with the most  substantial  presence  in a
jurisdiction  within 60 days after the Closing Date,  the  preparation  and
filing responsibility for the disputed jurisdictions shall be determined by
a mutually  acceptable  certified public  accounting firm. The filing party
shall  timely  pay all Taxes  with  respect  to such  Straddle  Period  Tax
Returns.

                  (b) For each  Straddle  Period  Tax Return  described  in
Section 3.01(a) of this TMA that includes any Marathon Tax Matter, Marathon
shall promptly  prepare and provide to New Ashland Inc. any  information or
documentation  reasonably  requested by New Ashland Inc. to facilitate  the
preparation  and filing of such Tax Return.  For each  Straddle  Period Tax
Return  described  in  Section  3.01(c) of this TMA that  includes  any New
Ashland  Inc.  Tax Matter,  New Ashland  Inc.  shall  promptly  prepare and
provide to Marathon any information or documentation  reasonably  requested
by Marathon to facilitate the preparation and filing of such Tax Return.

                  (c) All Straddle Period Tax Returns shall be submitted to
the other  party not later  than 30 days  prior to the due date,  including
extensions,  for the  filing  of such Tax  Returns  (or if such due date is
within 45 days  following  the Closing  Date,  as  promptly as  practicable
following  the  Closing  Date).  Such other  party  shall have the right to
review such Tax Returns and to review all workpapers and procedures used to
prepare any such Tax Return.  If the  nonfiling  party,  within 10 business
days after  delivery of any such Tax Return,  notifies  the filing party in
writing  that it objects to any of the Tax Items in such Tax  Return,  both
parties shall attempt in good faith to resolve the dispute and, if they are
unable to do so, the disputed  items shall be resolved  within a reasonable
time,  taking into account the  deadline  for filing such Tax Return,  by a
mutually  acceptable  certified public  accounting firm. Upon resolution of
all such Tax Items,  the filing  party  shall  file the  relevant  Straddle
Period Tax Return on that basis.  The  accounting  firm shall treat all Tax
Returns  of  the  parties  as  confidential,   and  shall  not  reveal  any
information  contained  in, or any part of, the Tax Returns of one party to
the other without prior written consent.  The costs,  fees, and expenses of
such certified  public  accounting  firm shall be borne equally by Marathon
and New Ashland Inc.

                  (d)  Marathon and New Ashland  Inc.,  as the case may be,
shall provide the other party with a calculation and  determination  of the
amount of the Straddle  Period Taxes that are included in any returns filed
by the other party under  Sections  3.01(a) and 3.01(c) of this TMA. In the
absence of a Final Determination, all such determinations shall be prepared
in a manner consistent with past practice.  If either party disputes such a
determination,  it may make a written  request  that the other party obtain
written confirmation from a mutually acceptable certified public accounting
firm that the determination is consistent with the preceding  sentence.  If
the accounting firm issues a confirmation, then such determination shall be
binding  upon  the  parties.  If the  accounting  firm  does  not  issue  a
confirmation,  then the  determination  in the returns  shall be amended to
permit a confirmation to be issued by the accounting firm in respect of the
amended  determination.  If a dispute is not resolved prior to the due date
of a Tax  Return,  the Tax  Return  shall be filed in  accordance  with the
determination  made by the filing party,  and both parties  hereby agree to
file or cause to be filed an amended Tax Return,  if necessary,  reflecting
the  resolution of the issue by the accounting  firm.  The accounting  firm
shall treat all Tax Returns of the parties as  confidential,  and shall not
reveal any information contained in, or any part of, the Tax Returns of one
party to the other without  prior written  consent.  The costs,  fees,  and
expenses of such certified public accounting firm shall be borne equally by
Marathon and New Ashland Inc.

                  SECTION 3.03.  Amended Tax Returns.  (a) New Ashland Inc.
shall be entitled to amend any Tax Return  described in Section  3.01(a) of
this TMA;  provided that, to the extent that such an amendment with respect
to a Straddle Period Tax Return  adversely  affects any Marathon Tax Matter
or would result in a Tax Detriment to Marathon,  such  amendment may not be
made  without  the prior  written  consent  of  Marathon,  which may not be
unreasonably  withheld  or  delayed.  New Ashland  Inc.  may  request  that
Marathon amend any Straddle Period Tax Return  described in Section 3.01(c)
of this TMA that Marathon is obligated to file, but only to the extent that
such amendment affects a New Ashland Inc. Tax Matter; provided that such an
amendment  shall be filed only with the prior written  consent of Marathon,
which may not be unreasonably withheld or delayed.

                  (b)  Marathon  shall be  entitled to amend any Tax Return
described in Section 3.01(c) of this TMA; provided that, to the extent that
such an amendment  with respect to a Straddle  Period Tax Return  adversely
affects any New Ashland Inc. Tax Matter or would result in a Tax  Detriment
to New  Ashland  Inc.,  such  amendment  may not be made  without the prior
written consent of New Ashland Inc., which may not be unreasonably withheld
or delayed.  Marathon may request that New Ashland Inc.  amend any Straddle
Period Tax Return described in Section 3.01(a) of this TMA, but only to the
extent that such amendment affects a Marathon Tax Matter or a Tax Item that
could  result  in a Tax  Detriment  to  Marathon;  provided  that  such  an
amendment shall be filed only with the prior written consent of New Ashland
Inc., which may not be unreasonably withheld or delayed.

                  (c) MAP shall not, and Marathon  shall not permit MAP to,
amend any Tax Return of MAP or any of its  subsidiaries for any Pre-Closing
Period or any  Straddle  Period  if such  amendment  would  result in a Tax
Detriment  to New Ashland  Inc.  without the prior  written  consent of New
Ashland Inc., which may not be unreasonably withheld or delayed.

                  (d) In the event  that a party  refuses  to consent to an
amendment  to a Tax Return to which such  consent is  required  pursuant to
this Section 3.03 and the parties are unable to resolve their disagreements
after good faith  attempts  to do so, the parties  shall  engage a mutually
acceptable  certified public  accounting firm to estimate the present value
of the realizable Tax Savings of the amendment to the party  proposing such
amendment and the present value of the realizable Tax Loss of the amendment
to the party  withholding its consent to such amendment.  If the accounting
firm  determines  that the  present  value of such  estimated  Tax  Savings
exceeds the present value of such estimated Tax Loss,  the party  proposing
such  amendment  shall be entitled to so amend the  applicable  Tax Return,
provided that such party agrees to pay to the party withholding its consent
an amount equal to the present value of any such Tax Loss.  The  accounting
firm shall treat all Tax Returns of the parties as confidential,  and shall
not reveal any information contained in, or any part of, the Tax Returns of
one party to the other without prior written consent. The fees and expenses
of the  accounting  firm  shall  be  borne  by  the  party  proposing  such
amendment.

                  SECTION 3.04.  Manner of Preparation and Filing.  All Tax
Returns,  and  amendments  thereto,  described in this Article III shall be
filed on a timely  basis  by the  party  responsible  for  filing  such Tax
Returns  under this  Agreement.  Except as provided in this  Section  3.04,
Section 5.01 and Section 7.03, and except as otherwise  required by a Final
Determination,  all Tax Returns, and amendments thereto,  shall be prepared
and filed in a manner  consistent  with the  provisions  of this  TMA,  the
Closing  Agreement,  and the Tax Opinion.  If any Tax Return of a member of
the Ashland Group or the New Ashland Inc.  Group  (including any Tax Return
related  to the  Acquired  Businesses)  for any  Pre-Closing  Period or any
Straddle  Period is prepared  and filed in a manner  inconsistent  with the
elections  (other than elections  relating to carrybacks and  carryforwards
described in Section 4.01), accounting methods,  conventions and principles
of  taxation  used for the most  recent  taxable  period of  members of the
Ashland Group or New Ashland Inc.  Group, as the case may be, for which Tax
Returns  involving  similar Tax Items have been filed, New Ashland Inc. and
each member of the New Ashland Inc.  Group shall  indemnify  each member of
the  Marathon  Group  against  all Tax  Detriments  and  reductions  in Tax
Benefits  that  result  from the  failure to use a  consistent  position as
provided  in  Section  2.01(a)  of this TMA and shall pay to  Marathon  the
amount of any  resulting  Tax Loss  within 30 days of the date of that such
Tax Loss is  considered to arise under the  principles  of Section  4.01(c)
below.

                  SECTION 3.05.  Agent for Filing Tax Returns.  (a) Subject
to Section 8.02(c), Marathon, Ashland and HoldCo each hereby designates New
Ashland  Inc.  as its  agent  to  take  any and all  actions  necessary  or
incidental  to the  preparation  and filing by New Ashland  Inc. of any Tax
Return described in Section 3.01(a). In addition,  Ashland and HoldCo agree
that they shall  designate 565  Corporation as the  "substitute  agent" (as
such term is used in  Treasury  Regulation  Section  1.1502-77(d))  for the
Ashland Affiliated Group. Marathon shall take any and all actions necessary
or incidental to obtain the approval of such designation by the IRS.

                  (b)  Marathon  shall be the  "Tax  Matters  Partner"  (as
defined under Code Section  6231(a)(7)) of MAP for all Pre-Closing  Periods
and all  Post-Closing  Periods and shall manage the audits of MAP conducted
by the IRS or any other Tax Authority.

                  SECTION  3.06.  Payments And  Refunds.  (a) To the extent
that  Marathon  is  responsible  for  filing  Straddle  Period or other Tax
Returns  that  include  Taxes for which New Ashland  Inc.  has  indemnified
Marathon,  New Ashland  Inc.  shall pay to Marathon  the amount of any such
Taxes two days prior to the due date of the Tax Return.  To the extent that
New Ashland Inc. is  responsible  for filing  Straddle  Period or other Tax
Returns that include Taxes for which Marathon has  indemnified  New Ashland
Inc.,  Marathon  shall pay to New Ashland Inc. the amount of any such Taxes
two days prior to the due date of such Tax Return.

                  (b) At any time,  either party in its sole discretion may
make a payment  to a Tax  Authority  with  respect to  Straddle  Period Tax
Return to stop the  running  of  interest  in whole or in part.  The paying
party shall provide the other party with a calculation and determination of
the amount of non-paying  party's share of such payment and the  non-paying
party  shall pay such  amount to the  paying  party  within  two days after
receipt of such notice.

                  (c) To the  extent  that  Marathon  receives  a Refund of
Taxes for which New Ashland Inc. has indemnified  Marathon,  Marathon shall
pay to New Ashland Inc. the amount of such Refund  (including  any interest
received by Marathon)  within ten days. To the extent that New Ashland Inc.
receives a Refund of Taxes for which Marathon has  indemnified  New Ashland
Inc.,  New Ashland  Inc.  shall pay to  Marathon  the amount of such Refund
(including any interest received by New Ashland Inc.) within ten days.

                  SECTION  3.07.  Section  355(e)  Taxes.  (a)  Payment  of
Section 355(e) Taxes. At least (i) 30 days before filing any Tax Return due
after the Closing Date (including an estimated, final or amended return) on
which any Section  355(e)  Taxes are required to be reported by the Ashland
Group or the New Ashland Inc. Group:  or (ii) upon a reasonable  request by
Marathon for purposes of preparing its financial  accounting  statements or
otherwise,  within 20 days of such request,  New Ashland Inc. shall deliver
to  Marathon a schedule  prepared  by  Deloitte & Touche LLP (the  "Section
355(e) Schedule")  setting forth New Ashland Inc.'s estimate of the amounts
of the Section 355(e) Taxes, the Section  358(d)(1)  Adjustment  Taxes, and
the Marathon Portion and the New Ashland Inc. Portion of the Section 355(e)
Taxes.  Such estimated  Section 355(e)  Schedule shall show  separately the
Federal,  state,  local and total amounts of the Section 355(e) Taxes.  The
Section 355(e) Schedule shall be prepared using a trading price for the New
Ashland Inc.  stock equal to the average of the high and low trading prices
of such stock on the New York Stock  Exchange on the Closing Date and shall
set forth the  estimated  tax basis of the stock of New Ashland  Inc. as of
the  Closing  Date.  Marathon  shall have the right to review  the  Section
355(e) Schedule and to review all workpapers and procedures used to prepare
such  schedule.  If Marathon,  within five business days after  delivery of
such schedule,  notifies New Ashland Inc. in writing that it objects to any
of the amounts set forth on the Section 355(e) Schedule, both parties shall
attempt in good faith to resolve the dispute  and, if they are unable to do
so, the  disputed  items shall be resolved  within a  reasonable  time by a
mutually acceptable certified public accounting firm and the Section 355(e)
Schedule  shall be amended  accordingly.  If a dispute is not  resolved  at
least two  business  days prior to the due date of the Tax Return,  the Tax
Return  shall be filed in  accordance  with  the  Section  355(e)  Schedule
prepared by Deloitte & Touche LLP, and both parties hereby agree to prepare
an amended Section 355(e) Schedule, if necessary, reflecting the resolution
of the issue by the accounting firm. The costs,  fees, and expenses of such
certified public accounting firm shall be borne equally by Marathon and New
Ashland Inc. Marathon,  as the successor to and on behalf of HoldCo,  shall
pay to New Ashland Inc. the  Marathon  Portion of the Section  355(e) Taxes
shown on the Section 355(e) Schedule two business days prior to the date on
which such Tax Return is due. New Ashland Inc. shall timely pay the Section
355(e)  Taxes shown on the Section  355(e)  Schedule  to the  relevant  Tax
Authorities and shall provide written evidence to Marathon that it has done
so.

                  (b) True-up  Upon Filing  Amended  Schedules,  Filing Tax
Returns or Final Determinations. New Ashland Inc. shall deliver to Marathon
an updated  Section 355(e)  Schedule at least 30 days (i) before the filing
of any Tax Return  (including  any estimated,  final or amended  return) on
which any Section 355(e) Taxes are reported; (ii) before making any payment
of  Section  355(e)  Taxes;  or (iii)  after any Final  Determination  with
respect to Section 355(e) Taxes (other than a Final Determination described
in parts (i) or (ii) of this  sentence).  To the extent  that the  Marathon
Portion shown on such updated  Section 355(e)  Schedule is greater than (or
less  than) the  Marathon  Portion  shown on the  Section  355(e)  Schedule
described in paragraph (a) above (or, if a true-up  payment has  previously
been made under this  paragraph (b), the updated  Section  355(e)  Schedule
that served as the basis for such true-up payment), Marathon shall promptly
pay to New  Ashland  Inc.  (or  New  Ashland  Inc.  shall  promptly  pay to
Marathon,  as the case may be) the amount of such  excess (or  deficiency),
together with interest (at the rate specified in Section 6.01(a)(i) of this
TMA) from the date of the prior  payment made under  paragraph  (a) or this
paragraph  (b). The  procedures  set forth in paragraph (a) for  Marathon's
review of the Section 355(e)  Schedule and the dispute  resolution  process
shall apply for purposes of the updated Section 355(e) Schedules under this
paragraph (b).

                                ARTICLE IV

                    Certain Tax Items and Tax Positions

                  SECTION 4.01.  Carrybacks and  Carryforwards.  (a) To the
extent  permissible by the  applicable  Tax law,  Marathon shall cause each
member of the  Marathon  Group  (including  former  members of the  Ashland
Group) not to carryback any Tax Item  attributable  to a  Post-Closing  Tax
Period to a  Pre-Closing  Tax Period of a member of the Ashland Group or of
the New Ashland Inc. Group. To the extent that Marathon is not permitted by
applicable  law to forgo such  carryback and requests that New Ashland Inc.
obtain a Refund of Tax with  respect to such  carryback,  then New  Ashland
Inc. shall take all reasonable  measures to obtain a Refund with respect to
the  carryback  (including  by filing an amended  return)  and shall pay to
Marathon  the Tax Savings  realized  by any member of the New Ashland  Inc.
Group by reason of such carryback,  including any interest received thereon
(provided,  further,  that the out-of-pocket costs associated with claiming
any  such  carryback  shall be borne by  Marathon).  To the  extent  that a
carryback  of a Tax Item  attributable  to a  Post-Closing  Tax Period to a
Pre-Closing Tax Period of a member of the New Ashland Inc. Group (including
a former  member of the Ashland  Group)  results in a Tax  Detriment to any
member of the New  Ashland  Inc.  Group (or  former  member of the  Ashland
Group), Marathon shall pay to New Ashland Inc. the Tax Loss realized by the
New Ashland Inc. Group by reason of such carryback.

                  (b) To the extent  permissible by the applicable Tax law,
with respect to any Tax Item  attributable to a Pre-Closing Tax Period that
may be  carried  forward  to a  Post-Closing  Tax Period of a member of the
Marathon  Group  (including  a former  member of the  Ashland  Group),  New
Ashland Inc.  shall cause each member of the New Ashland  Inc.  Group or of
the Ashland  Group to carry back any such Tax Item and not to carry forward
any such Tax Item to such a  Post-Closing  Tax  Period  of a member  of the
Marathon  Group  (including a former member of the Ashland  Group).  To the
extent that New Ashland Inc. is not  permitted by  applicable  law to carry
back  such Tax Item or to forgo  such  carry  forward  of such Tax Item and
requests  that  Marathon  obtain a Refund,  reduction or offset of Tax with
respect to such carry  forward,  then  Marathon  shall take all  reasonable
measures to obtain such a Refund,  reduction  or offset with respect to the
carry forward  (including by filing an amended return) and shall pay to New
Ashland Inc. the Tax Savings  realized by any member of the Marathon  Group
by reason of such carry forward,  including any interest  received  thereon
(provided,  further,  that the out-of-pocket costs associated with claiming
any such  carryforward  shall be borne by New Ashland Inc.).  To the extent
that a carry forward of a Tax Item, including without limitation, a foreign
oil extraction  loss as defined in Code Section  907(c),  attributable to a
Pre-Closing  Tax  Period to a  Post-Closing  Tax  Period of a member of the
Marathon Group  (including a former member of the Ashland Group) results in
a Tax Detriment to any member of the Marathon Group, New Ashland Inc. shall
pay to Marathon the Tax Loss  realized by the  Marathon  Group by reason of
such carry forward.

                  (c) A party shall be  considered to realize a Tax Savings
with  respect  to a  Tax  Benefit,  or a Tax  Loss  with  respect  to a Tax
Detriment,  to the extent, and only to the extent, that the amount of Taxes
it is  actually  required  to pay to the  applicable  Tax  Authority  for a
taxable period is decreased or increased  (respectively) from the amount of
Taxes it would have actually been required to pay to such Tax Authority for
such  taxable  period in the absence of such Tax Benefit or Tax  Detriment.
Such Tax Savings or Tax Loss shall be  considered to arise at the time that
such party's decreased or increased payment (respectively) for such taxable
period  is first  due or  otherwise  actually  realized  as a change in the
amount of Tax or Refund,  reductions or credit of Tax then due and payable.
If any party is considered under subsection (a) or (b) of this Section 4.01
to realize a Tax Savings for which it is required to make a payment, or Tax
Loss with  respect to which the other  party is required to make a payment,
the party  required to make such payment shall make such payment  within 30
days of the date such Tax Savings or Tax Loss is considered to arise.

                  (d) For  purposes  of this  Section  4.01,  a Tax Item is
deemed to be  attributable  to the taxable period in which it first accrued
or was otherwise taken into account for Tax purposes.  For the avoidance of
doubt,  a net  operating  loss,  foreign  tax credit or similar Tax Item is
deemed to be attributable to the taxable period in which the loss,  foreign
tax or  equivalent  event giving rise to such Tax Item first accrued or was
otherwise taken into account for Tax purposes.

                  SECTION 4.02. Special  Allocation of Certain  Deductions.
Ashland and Marathon  Company shall execute and deliver an amendment to the
MAP LLC  Agreement,  in the form  attached  hereto as Exhibit A, that shall
specially allocate to Marathon Company any Pass-Through Items that would be
allocable to New Ashland Inc. in the absence of such amendment and that are
attributable to a payment that is (1) described in Section 12.01(d)(vii) of
the Master Agreement,  which results in a special non-pro rata distribution
to  Ashland,  or (2) made with  respect to the St. Paul Park QQQ Project or
the Plains  Settlement (as both are described in Section 9.09 of the Master
Agreement).  If any such  payment  produces a Tax Benefit for any member of
the New Ashland Inc. Group, then New Ashland Inc. shall pay to Marathon the
amount of any resulting Tax Savings actually realized by such member of the
New Ashland Inc.  Group within 30 days of the date that such Tax Savings is
realized.  Such Tax Savings  shall be considered to be realized by a member
of the New Ashland Inc.  Group or the Marathon  Group,  as the case may be,
pursuant to the principles of Section 4.01(c) above.

                  SECTION  4.03.  Increase  in Tax  Basis  of  Certain  MAP
Deductions  for  Post-Closing   Payments.   If  as  a  result  of  a  Final
Determination  with respect to whether certain refinery assets  contributed
by  Ashland  to MAP  are  considered  to be  asset  class  13.3  (Petroleum
Refining) or 28.0  (Manufacture  of  Chemicals  and Allied  Products),  New
Ashland Inc.  pays any  additional  Tax with respect to a  Pre-Closing  Tax
Period,  and  such  Final  Determination  results  in the  increase  in the
adjusted  Tax  basis as of the date of such  contribution  of any  asset or
property  of MAP that was  contributed  by Ashland to MAP,  Marathon  shall
cause MAP to take  depreciation  deductions with respect to such additional
Tax basis to the maximum extent allowed,  and as promptly as permitted,  by
applicable  law,  which  shall  include  Marathon  causing MAP to amend any
relevant  Tax Return of MAP.  Marathon  shall pay to New Ashland  Inc.  the
amount of any Tax Savings  realized by a member of the Marathon  Group as a
result of the use of such  additional  Tax basis within 30 days of the date
that such Tax Savings is realized under the  principles of Section  4.01(c)
above.

                                 ARTICLE V
                       Specified Liability Deductions

                  SECTION   5.01.    Deduction   of   Specified   Liability
Deductions; Request for Closing Agreement. The parties will request the IRS
to enter into the Closing Agreement with Marathon,  Ashland and New Ashland
Inc with respect to the  Transactions.  If the IRS enters into such Closing
Agreement, the Specified Liability Deductions shall be claimed by HoldCo on
the Marathon Affiliated Group's  consolidated Federal income tax return for
each taxable period in which the Closing  Agreement is in effect and not by
New Ashland Inc. or any member of the New Ashland Inc. Group. The amount of
the Specified Liability  Deductions claimed by Marathon shall be determined
under the Net Deduction  Method  unless a different  method is specified in
the Closing  Agreement.  If a different  method is specified in the Closing
Agreement,  the parties  will  negotiate in good faith to amend this TMA to
provide adequate protections to each of the parties' respective  interests.
Unless  explicitly  provided to the  contrary in this  Article V,  Marathon
shall retain full control over all Tax Items on its Tax Returns.

                  SECTION 5.02 Tax Benefit  Payments  from  Marathon to New
Ashland Inc. (a) (i) If the IRS enters into the Closing Agreement, then for
each  taxable  year  for  which  HoldCo  claims  the  Specified   Liability
Deductions  it shall make a payment to New  Ashland  Inc. in respect of the
Federal Tax Benefits  attributable to such Specified  Liability  Deductions
(the "Federal Tax Benefit Payment") and one or more payments to New Ashland
Inc. in respect of the state, local or foreign Tax Benefits attributable to
such Specified Liability  Deductions (the "Non-Federal Tax Benefit Payment"
and,  together  with the  Federal  Tax Benefit  Payment,  the "Tax  Benefit
Payments").

                  (ii) The Federal Tax Benefit  Payment for a taxable  year
shall  equal the sum of the Basket One Amount and the Basket Two Amount for
such taxable year. The  Non-Federal  Tax Benefit Payment for a taxable year
shall  be  determined  with  respect  to the  entire  amount  of  Specified
Liability  Deductions  for such taxable year on a "with and without"  basis
under the  methodology and principles  applicable  solely to the Basket Two
Amount, with appropriate adjustments to reflect the differences between the
Code and the  applicable  Tax law for such  purpose,  and there shall be no
Basket One Amount or Basket One Deductions  for such purpose.  For purposes
of  calculating  the Tax  Benefit  Payments,  the  amount of the  Specified
Liability  Deductions  shall be determined  using the Net Deduction  Method
unless another method is specified in the Closing Agreement.

                  (iii) The Tax Benefit  Payments shall be paid directly to
New Ashland Inc. or placed in escrow as provided in Article VI below.

                  (b) (i)  Basket  One  Amount.  For each  taxable  year of
HoldCo  ending on or before  January 1, 2025,  the Basket One Amount  shall
equal the Basket One Tax Rate  multiplied by the Basket One  Deductions for
such taxable  year.  For each  taxable  year ending on or after  January 1,
2025, the Basket One Amount, and the Basket One Deductions, shall be $0.00.

                  (ii) Definitions.

                  (A) The  Basket  One Tax Rate for a  taxable  year  shall
         equal the highest  marginal  Federal income tax rate applicable to
         corporations for such taxable year minus 3 percentage  points.  As
         of the date of this TMA,  the  Basket  One Tax Rate is 32% (35% --
         currently the highest  marginal Federal income tax rate applicable
         to  corporations  (Section  11 of the Code) -- minus 3  percentage
         points).

                  (B) The Basket One  Deductions  for a taxable  year shall
         equal the lesser of (I) the  Specified  Liability  Deductions  for
         such  taxable  year and (II) the Basket  One Cap for such  taxable
         year.

                  (C) The Basket One Cap for a taxable year shall equal (I)
         $30 million adjusted by the Inflation Factor, but in no event more
         than $60 million (the "Basket One Cap Base Amount"), plus (II) the
         unused Basket One Cap  Carryforward,  if any, from each of the two
         preceding   taxable  years.   The  Basket  One  Cap   Carryforward
         originating  in a taxable year shall equal the excess,  if any, of
         the Basket  One Cap Base  Amount  for such  taxable  year over the
         Specified  Liability  Deductions for such taxable year.  Specified
         Liability  Deductions for a taxable year shall be considered to be
         used first against,  and to the extent of, the Basket One Cap Base
         Amount for such  taxable  year.  For purposes of  determining  the
         amount of the Basket One Cap  Carryforward  "used" in a particular
         taxable  year,  the  excess,  if any, of the  Specified  Liability
         Deductions  for that  taxable  year over the  Basket  One Cap Base
         Amount for such taxable year shall be  considered to be used first
         against,  and the  extent  of,  the  Basket  One Cap  Carryforward
         originating  in  the  second  preceding  taxable  year;  and  next
         against,  and to the extent  of,  the Basket One Cap  Carryforward
         originating in the immediately preceding taxable year.

                  (c) (i)  Basket Two  Amount.  The Basket Two Amount for a
taxable year shall be determined  on a "with and without"  basis to measure
the actual Tax savings  realized by the Marathon  Affiliated Group from its
use of Basket Two Deductions and Basket Two Carryovers, and shall equal the
excess (if any) of (A) the amount of Federal  income tax that the  Marathon
Affiliated  Group  would  have been  required  to pay with  respect to such
taxable year if there were no Basket Two Deductions  for, and no Basket Two
Carryovers  to, such taxable year over (B) the amount of Federal income tax
that the  Marathon  Affiliated  Group  was  actually  required  to pay with
respect to such taxable year.

                  (ii) Definitions.

                  (A) The Basket Two  Deductions  for a taxable  year shall
         equal the  excess,  if any, of (I) the total  Specified  Liability
         Deductions  for  such  taxable  year  over  (II)  the  Basket  One
         Deductions for such taxable year.

                  (B) The Basket  Two  Carryovers  to a taxable  year shall
         equal the amount of Basket  Two  Carryovers  originating  in other
         taxable years and carried  forward or carried back to such taxable
         year. The Basket Two Carryovers  originating in a taxable year are
         the  carryovers  of  net  operating  losses,  excess  foreign  tax
         credits,  minimum tax  credits or other Tax Items of the  Marathon
         Affiliated  Group,  if any, that  originate in such year under the
         principles of the Code, but only to the extent such carryovers are
         greater  than  the  amount  of such  carryovers  that  would  have
         originated in such taxable year if the Marathon  Affiliated  Group
         had no Basket Two  Deductions  for such taxable year and no Basket
         Two  Carryovers to such taxable year.  Carryovers of all Tax Items
         shall be  considered  to be subject  to the rules of the  Internal
         Revenue  Code and the  Treasury  Regulations  governing  the carry
         forward,  carryback,  use, limitation and expiration of carryovers
         of the relevant  type of Tax Item.  If the carryover of a Tax Item
         originating  in a taxable year includes a portion that is a Basket
         Two  Carryover  and  another  portion  that  is not a  Basket  Two
         Carryover, such portions shall be considered to be used on a "with
         and without basis" as described in Section 5.02(c)(i) above.

                  (d) Redeterminations. The Basket One Amount for a taxable
year, once determined,  shall not be redetermined for any reason other than
an adjustment in the amount of the Specified Liability  Deductions for such
taxable  year  resulting  from a Tax Claim with  respect to the New Ashland
Inc.  Affiliated Group or the Marathon Affiliated Group by a Tax Authority.
The  Basket  Two  Amount  for a  taxable  year  shall  be  redetermined  at
appropriate times (e.g., payment,  refund, or Final Determination),  taking
into account actual  adjustments  with respect to Tax Claims and subsequent
events that  affect the  calculation  of the Basket Two  Amount,  including
carry  forwards  and  carrybacks.  Payments of the  increased  or decreased
amount of any Tax Benefit  Payments  for any taxable  year shall be made as
provided in Article VI below.

                   (e)  Verification  by Accounting  Firm. For each taxable
year,  unless Marathon and New Ashland Inc.  otherwise  agree,  New Ashland
Inc. at its own expense will cause a nationally  recognized accounting firm
to prepare and deliver to Marathon a certificate,  in a form  acceptable to
Marathon, verifying the amount and deductibility of the Specified Liability
Deductions  for such taxable year (taking into account any issues raised by
the IRS from time to time),  which verification shall include the amount of
actual and accruable  insurance  recoveries for such year. New Ashland Inc.
will at its own expense  provide to Marathon a written  opinion of Cravath,
Swaine & Moore LLP or any  other law firm  acceptable  to  Marathon,  which
opinion  shall be addressed to New Ashland Inc. and may rely on the Closing
Agreement,  to the effect  that  Marathon  will be  entitled  to deduct the
Specified  Liability  Deductions  on its Tax Return.  Such opinion shall be
updated or amended,  from time to time, as Marathon may reasonably  request
to take into account  material changes in facts or in law. For each taxable
year, unless Marathon and New Ashland Inc. otherwise agree, Marathon at its
own expense will cause a nationally  recognized  accounting firm to prepare
and deliver to New Ashland Inc. a  certificate  verifying the amount of Tax
Benefit Payments for such taxable year,  provided that no such verification
shall be required  with respect to  Non-Federal  Tax Benefit  Payments with
respect to any  jurisdiction in which the Tax liability of Marathon and the
other  members of the  Marathon  Group for such  taxable  year is less than
$500,000  unless  New  Ashland  Inc.  agrees  to  bear  the  cost  of  such
verification.

                   (f) (i)  Principles  and Examples.  The parties have set
forth  the  examples  in  Exhibit  B  attached  hereto  to  illustrate  the
application  of this  Article V and of Article VI below.  The parties  have
also agreed  that Tax Benefit  Payments in respect of the Basket One Amount
shall be payable  without  regard to whether  Marathon or any member of the
Marathon  Group  realizes an actual Tax savings  from the use of the Basket
One  Deductions;  that Tax  Benefit  Payments  in respect of the Basket Two
Amount  shall be payable  only to the extent that the  Marathon  Affiliated
Group  realizes  an  actual  Tax  savings  from the use of the  Basket  Two
Deductions on a "with and without" basis; and that any Specified  Liability
Deduction  shall  potentially  give rise to a single  Basket  One Amount or
Basket Two Amount and shall not be  double-counted.  Any  uncertainties  or
ambiguities in the computation of the Tax Benefit  Payments for any taxable
year shall be resolved in a manner that is consistent  with the examples in
Exhibit B and with such principles.

                  (ii) Short Taxable Years. The provisions of Article V and
Article  VI  are  based  on  taxable  years  of  twelve  full  months.  The
application of such provisions shall be appropriately adjusted in the event
of one or more taxable years of less than 12 months to effectuate the goals
and principles of Article V and Article VI.

                  (iii) Successors.  In the event that there is a successor
to the New Ashland Inc.  Affiliated Group or the Marathon Affiliated Group,
the provisions of this Article V shall be applied to such  successors as if
they were the New Ashland Inc.  Affiliated Group or the Marathon Affiliated
Group, respectively.

                                ARTICLE VI

                  Payments of Tax Benefit Amounts; Escrow

                  SECTION 6.01 Time of Tax Benefit  Payments.  (a) Original
Payments.  Subject to Section 6.02 below, Marathon shall pay to New Ashland
Inc. or place in Escrow,  as the case may be, the amount of the Tax Benefit
Payment as follows:

                  (i)  Federal Tax Benefit  Payments.  If New Ashland  Inc.
provides to Marathon a good faith  estimate of the amount of the  Specified
Liability Deductions for a calendar year by November 30th of such year, and
verification of the Specified  Liability  Deductions as required in Section
5.02(e) for such calendar year by February 28th of the following year, then
Marathon  shall pay to New Ashland Inc. or Escrow,  as the case may be, the
amount  of  the  Federal  Tax   Benefit   Payment  for  the  taxable   year
corresponding to such calendar year either (A) within 10 days after the due
date of the Marathon  corporate  income Tax Return  without  extensions for
such taxable year  (generally  March 15th), or (B) within 10 days after the
due date of the  corporate  income Tax Return for the  Marathon  Affiliated
Group,  with extensions for such calendar year (generally  September 15th),
with interest from the due date of such Tax Return without extension to the
date  of  payment  at  the  Marathon  short-term  borrowing  rate  for  the
applicable  period.  If New Ashland  Inc.  does not provide to Marathon the
estimate and the actual determination of the Specified Liability Deductions
within the time requirements of the preceding sentence, then Marathon shall
pay to New Ashland  Inc.  or Escrow,  as the case may be, the amount of the
Federal Tax Benefit  Payment  for such  taxable  year within 10 days of the
later of (A) the date on which New Ashland Inc. provides such determination
to Marathon and (B) the due date of the Federal corporate income Tax Return
for the Marathon  Affiliated  Group,  with extensions for such taxable year
(generally September 15th), in each case without interest.

                  (ii) Non-Federal Tax Benefit Payments. Marathon shall pay
to New  Ashland  Inc. or Escrow,  as the case may be, in each case  without
interest,  the amount of the Non-Federal Tax Benefit Payments for a taxable
year within 30 days after the due date of the relevant  HoldCo  separate or
combined,  as the case may be,  state,  local or foreign Tax Returns,  with
extensions.

                  (b)  Redeterminations.  If an  event  giving  rise to the
redetermination  of a Tax Benefit  Payment  for any taxable  year occurs as
provided in Section  5.02(d) above,  the party becoming aware of such event
shall promptly notify the other party.

                  (i) If such redetermination  increases the amount of such
Tax Benefit Payment, then within 30 days after the receipt by Marathon of a
Refund  corresponding to such Tax Benefit Payment,  or, if there is no such
Refund, then within 30 days after such redetermination,  Marathon shall pay
to New  Ashland  Inc.  or  Escrow,  as the case may be,  the amount of such
increase,  together  with the  corresponding  amount of  interest  (if any)
payable by the relevant Tax Authority with respect to such redetermination.

                  (ii) If such redetermination decreases the amount of such
Tax Benefit Payment,  then, within 30 days after the payment by Marathon of
the Tax corresponding to such redetermination,  or, if there is no such Tax
payment, then within 30 days after such redetermination, the amount of such
decrease (including any interest, penalty or addition to Tax resulting from
such redetermination) shall be paid to Marathon as provided in this Section
6.01(b)(ii).  Such  decrease  shall be paid  first by  paying  to  Marathon
amounts  in  Escrow  up to the  amount  of such  decrease  (and all  future
payments to New Ashland  Inc.  under this TMA for the current  taxable year
and  subsequent  taxable years shall be escrowed  until the Escrow is Fully
Funded, as provided in Section 6.02(c) below). If such decrease exceeds the
amount so paid to Marathon from the Escrow, New Ashland Inc. shall pay such
excess to Marathon; provided that if the total amount that New Ashland Inc.
would be required to pay to Marathon in a  particular  calendar  year under
this  Section  6.01(b)(ii)  as a  result  of any and  all  redeterminations
exceeds $25  million,  then New Ashland  Inc.  may pay such excess over $25
million in eight equal semi-annual payments, with the first payment due six
months from the date of such redetermination,  with interest computed at an
interest  rate as  reasonably  determined by Marathon to be the market rate
for four-year  amortizing  loans available to companies with credit ratings
similar to that of New Ashland Inc.;  provided  further that if New Ashland
Inc.  undergoes a Bankruptcy  Event,  all such amounts shall be immediately
due and payable to Marathon.

                  SECTION 6.02 Escrow.  (a) Escrow Agreement.  In the event
that any Tax Benefit  Payments  are  required  under this  Agreement  to be
placed in Escrow,  the parties will execute an Escrow Agreement in the form
as to be agreed to by the parties and attached  hereto as Exhibit C to this
TMA.  Unless  otherwise  agreed by the parties,  The Bank of New York shall
serve as escrow agent under the Escrow Agreement.  The out-of-pocket  costs
and expenses of creating and maintaining the Escrow,  including the fees of
the escrow agent, shall be shared equally by Marathon and New Ashland Inc.

                  (b) Basket One Benefits.  Except as otherwise provided in
this  Section  6.02(b),  all Tax Benefit  Payments in respect of Basket One
Amounts  shall be paid by Marathon  directly to New Ashland  Inc. and shall
not be  placed  in  Escrow.  Notwithstanding  the  foregoing,  Tax  Benefit
Payments in respect of Basket One Amounts  shall be placed in Escrow in the
following circumstances:

                  (i) If New Ashland Inc. has undergone a Bankruptcy Event,
all Tax Benefit Payments in respect of Basket One Amounts otherwise payable
by  Marathon to New  Ashland  Inc. on or after the date of such  Bankruptcy
Event  shall be placed in Escrow as if they were in  respect  of Basket Two
Amounts  until such time that any judgment,  order,  proceeding or petition
that constitutes a Bankruptcy Event has been dismissed or discharged.

                  (ii) In the  circumstances  described in Section  6.02(d)
below.

                  (c) Basket Two Benefits.  Except as otherwise provided in
this  Section  6.02(c)  all Tax  Benefit  Payments in respect of Basket Two
Amounts  shall be paid by Marathon  directly to New Ashland  Inc. and shall
not be  placed  in  Escrow.  Notwithstanding  the  foregoing,  Tax  Benefit
Payments in respect of Basket Two Amounts  shall be placed in Escrow in the
following circumstances:

                  (i) If the  Escrow is not  Fully  Funded at the time that
such a Tax Benefit  Payment for a taxable year is required to be made, then
the amount of such Tax Benefit Payment  necessary to cause the Escrow to be
Fully Funded shall be placed in Escrow.

                  (A) The Escrow shall be  considered to be Fully Funded at
                  the time a Tax  Benefit  Payment  for a  taxable  year is
                  required  to be made if the  amount in the Escrow at such
                  time is equal  to the  excess  (if any) of (I) the  total
                  amount of Tax  Benefit  Payments  other  than  Basket One
                  Amounts  paid or payable  for such  taxable  year and the
                  four  preceding   taxable  years  over  (II)  the  Escrow
                  Threshold at such time.

                  (B) If New Ashland Inc. has a credit  rating  provided by
                  Moody's or Standard & Poor (or successors thereto) at the
                  relevant  time,  the Escrow  Threshold  at any time shall
                  equal:

                       a.  If the  credit  rating of New  Ashland  Inc.  is
                           either a BB+ or Ba1 or higher, unlimited.

                       b.  If the  credit  rating of New  Ashland  Inc.  is
                           either  a  BB  or  Ba2,  $50  million  (for  the
                           calendar years 2005 through  2009);  $55 million
                           (for the calendar years 2010 through  2014);  or
                           $60 million (for calendar years after 2014).

                       c.  If the  credit  rating of New  Ashland  Inc.  is
                           either a BB- or Ba3, $25 million.

                       d.  If the credit  rating of New Ashland Inc. is (A)
                           below  BB- or  Ba3,  or  (B)  New  Ashland  Inc.
                           undergoes  a  Bankruptcy  Event,  $0;  provided,
                           however,  that  this  subparagraph  (B) will not
                           apply after the date that any  judgment,  order,
                           proceeding  or  petition   that   constitutes  a
                           Bankruptcy   Event   has   been   dismissed   or
                           discharged.

                  (C) If, at the time any Tax Benefit Payment for a taxable
                  year is required to be made,  New Ashland  Inc.  does not
                  have a credit  rating  provided  by Moody's or Standard &
                  Poor (or  successors  thereto),  New  Ashland  Inc.  will
                  obtain, at its own cost, from Moody's or Standard & Poor,
                  or both,  a pro forma  credit  rating  and  provide  such
                  rating to Marathon  prior to the time of such Tax Benefit
                  Payment. Such rating will be updated at least annually.

                  (ii) In the  circumstances  described in Section  6.02(d)
below.

                  (d) Certain  Changes in Escrow  Threshold.  If the Escrow
Threshold  decreases as a result of a reduction in the credit rating of New
Ashland  Inc.,  the  occurrence  of a Bankruptcy  Event with respect to New
Ashland  Inc. or the payment of Escrowed  funds to Marathon in respect of a
redetermination  of a Tax Benefit  Payment as  provided in Section  6.01(b)
above, and as a result the Escrow is not Fully Funded, then all payments to
New Ashland Inc. under this TMA, net of set-off,  including all Tax Benefit
Payments in respect of Basket One Amounts and Basket Two Amounts,  shall be
placed in Escrow until the Escrow is Fully Funded.

                   (e) Release of Escrowed Amounts. Except as provided in
Section  6.02(d)  above,  any amounts  placed in Escrow in respect of a Tax
Benefit  Payment for a taxable year shall be released  from Escrow upon the
fifth  anniversary of the filing of the corporate income Tax Return for the
Marathon  Affiliated Group for such taxable year and shall be paid directly
to New Ashland  Inc.  If, as a result of an upgrade in New  Ashland  Inc.'s
credit  rating or any other  event,  the amount in the Escrow  exceeds  the
amount required to cause the Escrow to be Fully Funded,  then the amount of
such excess shall be promptly released from the Escrow and paid directly to
New Ashland Inc.  Whenever  Escrowed Amounts are required to be released to
New Ashland Inc. pursuant to this Section 6.02(e), Marathon and New Ashland
Inc.  shall  promptly   deliver  to  the  escrow  agent  detailed   written
instructions  directing  the release of such  Escrowed  Amounts,  signed on
behalf of both Marathon and New Ashland Inc.

                   (f)  Other   Arrangements.   The   Escrow   arrangements
described in this Section  6.02 may be replaced  with other credit  support
reasonably acceptable to and approved by Marathon, which approval shall not
be unreasonably withheld.

                                ARTICLE VII

                 Covenants, Representations and Warranties

                  SECTION 7.01.  Representations  and Warranties of Ashland
and New Ashland Inc.  Ashland and New Ashland Inc.,  jointly and severally,
represent and warrant to Marathon  that,  as of the date of this  Agreement
and as of the Closing Date as though made on the Closing Date:

                  (a) It knows of no fact that could reasonably be expected
to cause any  representation,  warranty or other statement contained in the
Closing  Agreement,  a Tax  Certificate  or the Tax Opinion to be incorrect
(including by omission of a material fact).

                  (b) No  member  of the New  Ashland  Inc.  Group  has any
current plan or  intention to take any action,  or fail to take any action,
that  would be  inconsistent  with any  representation,  warranty  or other
statement  made by, or that  relates  primarily  to,  any member of the New
Ashland  Inc.  Group  and is  contained  in the  Closing  Agreement,  a Tax
Certificate or the Tax Opinion.

                  (c)  New  Ashland  Inc.  will  use  its  reasonable  best
efforts,  with the assistance  and  participation  of Marathon,  to have at
least $21 million  dollars on deposit,  decreased  for any amounts  applied
against Taxes for  Pre-Closing Tax Periods (other than Federal Income Taxes
shown as owing on any Tax Returns for the Ashland  Affiliated Group's 2003,
2004 and 2005 fiscal years),  with the IRS with respect to liabilities  for
Taxes for  Pre-Closing  Tax Periods  (including  interest on such amounts).
This  amount  shall be used (to the extent  necessary)  for the  payment or
settlement of such Taxes and interest and shall not be withdrawn prior to a
Final Determination with respect to such Taxes and interest. Any portion of
such  deposit that is not used for the payment or  settlement  of Taxes for
such  periods  (including  interest on such  amounts)  shall be paid to New
Ashland Inc.

                  (d) Following the Transactions,  New Ashland Inc. intends
to continue the active  conduct of  Valvoline,  independently  and with its
separate officers,  directors, and employees, and New Ashland Inc. does not
plan any substantial reduction in business activity of Valvoline.

                  (e) To the  best  of the  knowledge  of  Ashland  and New
Ashland Inc., there are no material Ashland Residual Operations Liabilities
other than those that Ashland has disclosed to the IRS and Marathon.

                  (f) Ashland  and New Ashland  Inc.  have  prepared  their
estimate of the adjusted tax basis of the New Ashland Inc.  common stock in
good faith.

                  SECTION 7.02. Representations and Warranties of Marathon.
Marathon  represents  and warrants to Ashland and New Ashland Inc. that, as
of the date of this  Agreement and as of the Closing Date as though made on
the Closing Date:

                  (a) It knows of no fact that could reasonably be expected
to cause any  representation,  warranty or other statement contained in the
Closing  Agreement,  a Tax  Certificate  or the Tax Opinion to be incorrect
(including by omission of a material fact).

                  (b) No  current  member  of the  Marathon  Group  has any
current plan or  intention to take any action,  or fail to take any action,
that  would be  inconsistent  with any  representation,  warranty  or other
statement made by, or that relates primarily to, any member of the Marathon
Group and is contained in the Closing  Agreement,  a Tax Certificate or the
Tax Opinion.

                  (c) For the two-year period  following the  Transactions,
Marathon intends to continue the active conduct of the Acquired Businesses,
independently and, except as described in the Closing Agreement, with their
separate officers,  directors and employees, and Marathon does not plan any
substantial  reduction in business  activity  for the  Acquired  Businesses
during such period.

                  SECTION 7.03. Covenants of New Ashland Inc. and Marathon.
(a) (i) Each of Ashland and New Ashland Inc.  agrees that it shall not take
or omit to take,  and shall not permit any of the Ashland  Group or the New
Ashland Inc. Group, respectively,  to take or omit to take, any action that
will, or would reasonably be expected to, cause any written  representation
contained in the Closing Agreement, a Tax Certificate or the Tax Opinion to
be incorrect.

                  (ii) Each of Ashland and New Ashland Inc.  agrees that it
shall, and shall cause each member of the Ashland Group and the New Ashland
Inc.  Group,  respectively,  to prepare and file all Tax Returns on a basis
consistent  with the  Closing  Agreement  and the Tax  Opinion,  except  as
otherwise required by Article V or a Final Determination; provided that, to
the extent that the Closing  Agreement and the Tax Opinion are inconsistent
in any  respect,  such Tax Returns  shall be prepared  and filed on a basis
consistent with the Closing Agreement.

                  (iii)  New  Ashland  Inc.  will use its  reasonable  best
efforts,  with the assistance and participation of Marathon, to maintain at
least $21 million dollars,  decreased for any amounts applied against Taxes
for Pre-Closing Tax Periods (other than Federal Income Taxes shown as owing
on any Tax Returns for the Ashland  Affiliated  Group's 2003, 2004 and 2005
fiscal  years),  on  deposit  with the IRS for  Taxes for  Pre-Closing  Tax
Periods (including interest on such amounts). This amount shall be used (to
the  extent  necessary)  for the  payment or  settlement  of such Taxes and
interest and shall not be  withdrawn  prior to a Final  Determination  with
respect to such Taxes and interest. Any portion of such deposit that is not
used for the payment or  settlement  of Taxes for such  periods  (including
interest on such amounts) shall be paid to New Ashland Inc.

                  (iv)  New  Ashland  Inc.  will  forgo  the  use of  bonus
depreciation on all Ashland  property  eligible for bonus  depreciation and
will elect to use straight line depreciation on such property on its fiscal
2004 Tax  Return  and its Tax Return  for the  taxable  year  ending on the
Closing Date. New Ashland Inc. will use its reasonable  best efforts,  with
the assistance and  participation  of Marathon,  to consider all reasonable
steps to  maximize  the tax basis of the New  Ashland  Inc.  common  stock;
provided,  however,  New Ashland Inc. in its sole  discretion may determine
that it will not adopt or implement any such steps.

                  (b) (i) Marathon  agrees that, for a period  beginning on
the Closing Date and ending two years after the Closing  Date, it shall not
take or omit to take, and shall not permit any member of the Marathon Group
to take or omit to take,  any action  that  will,  or would  reasonably  be
expected  to,  cause any written  representation  contained  in the Closing
Agreement,  or a Tax  Certificate,  and that is specified on Schedule  2.04
attached hereto, to be incorrect.

                  (ii) Marathon agrees that it shall,  and shall cause each
member of the  Marathon  Group to,  prepare  and file all Tax  Returns on a
basis consistent with the Closing Agreement and the Tax Opinion,  except as
otherwise required by Article V or a Final Determination; provided that, to
the extent that the Closing  Agreement and the Tax Opinion are inconsistent
in any  respect,  such Tax Returns  shall be prepared  and filed on a basis
consistent with the Closing Agreement.

                  (iii) Marathon agrees that, for a period beginning on the
Closing Date and ending two years after the Closing Date, it (A) shall not,
and shall cause each member of the Marathon Group not to, amend the Company
Leverage  Policy set forth in Schedule  8.14 to the MAP LLC  Agreement,  as
such Policy is amended and  restated as of the date of this  Agreement  and
(B) shall  cause MAP to comply  at all  times  with such  Company  Leverage
Policy;  provided that,  Marathon may amend the Company  Leverage Policy to
the extent that both  Marathon  and New Ashland  Inc.  reasonably  agree is
consistent with the Closing Agreement.

                  (iv) Marathon agrees that, for a period  beginning on the
Closing Date and ending two years after the Closing Date, it shall not, and
shall  cause each  member of the  Marathon  Group not to,  make any capital
contribution of money or other property to MAP or any JV Entity  (including
any capital contribution pursuant to Article IV of the MAP LLC Agreement or
any  other  provision  of  the  MAP  LLC  Agreement)   other  than  capital
contributions (i) that are the result of, and in response to, Extraordinary
Events;  or (ii) if the  Closing  Agreement  provides  that the MAP Partial
Redemption does not constitute a disguised sale, capital  contributions for
purposes specifically identified in the Closing Agreement.

                  (v) During the period  beginning  on October 1, 2004 (or,
if  earlier,  the day before the  Closing  Date) and ending on the date two
years after the Closing Date, Marathon shall cause MAP and its subsidiaries
not to, and MAP and its  subsidiaries  shall not (A) incur any indebtedness
owed to Marathon or any affiliate of Marathon (other than borrowings  under
the  Detroit  Facility)  or (B)  incur any  indebtedness  under one or more
revolving credit facilities,  uncommitted money market credit facilities or
other  comparable  debt  facilities  to the  extent  such  indebtedness  is
guaranteed,  directly  or  indirectly,  by  Marathon  or any  affiliate  of
Marathon  (other  than such an  affiliate  that is MAP or any  wholly-owned
subsidiary  of  MAP),   except  such  Marathon   guaranteed  debt  will  be
permissible  if  the  Closing  Agreement  provides  that  the  MAP  Partial
Redemption  does not constitute a disguised sale and the Closing  Agreement
contemplates debt guaranteed by Marathon.

                  (vi)  Marathon  agrees  that during the  two-year  period
beginning on the Closing  Date, it shall cause MAP not to make any sales of
receivables  except for sales of  receivables  pursuant to the  Receivables
Sales Facility (as such term is defined in the MAP LLC Agreement). Marathon
and MAP agree that if MAP makes any sales of  receivables  pursuant  to the
Receivables  Sales  Facility  they will  treat  such sales (A) as sales for
Federal  income  tax  purposes  and (B)  based on the  relevant  accounting
pronouncements,  as they exist on the date of this Agreement,  as sales for
financial accounting purposes. If as a result of any change or modification
to such  accounting  pronouncements  between the date of this Agreement and
the Closing Date,  Marathon  concludes  that it and MAP will not be able to
treat such sales of receivables as sales for financial accounting purposes,
it shall  cause  MAP to use its  reasonable  best  efforts  to  modify  the
Receivables Sales Facility in order to achieve sale treatment for financial
accounting  purposes,  if such modification can be made in a manner that is
(i)  acceptable  to  Marathon  from  a tax  point  of  view  and  otherwise
reasonably  acceptable to Marathon,  and (ii)  acceptable to Ashland from a
tax point of view. If such a change in accounting pronouncements arises and
Marathon,  after  discussions  with  Ashland,  concludes  that it cannot so
modify the  Receivables  Sales  Facility,  Marathon shall deliver a written
notice to Ashland  attesting to this  conclusion at least two business days
prior to the Closing Date.  The failure of Marathon to deliver such written
notice  shall  constitute  its  agreement  to the second  sentence  of this
paragraph   (vi)    notwithstanding   any   such   change   in   accounting
pronouncements.  Marathon  further  agrees that if the relevant  accounting
pronouncements  change  after the  Closing  Date  and,  as a result of such
changes, Marathon concludes that it and MAP will not be able to treat sales
of  receivables  pursuant to the  Receivables  Sales  Facility as sales for
financial  accounting  purposes,  Marathon  shall  cause MAP to modify  the
Receivables Sales Facility in order to achieve sale treatment for financial
accounting purposes if it can do so at an insignificant cost (provided that
such  modification  is  acceptable  to New Ashland Inc. from a tax point of
view) or if New Ashland Inc.  agrees to indemnify  Marathon and MAP for any
increased costs that result from such changes.

                  SECTION  7.04.  Valuation  Report.  Each of  Ashland  and
Marathon shall use its  reasonable  best efforts to cause Deloitte & Touche
LLP to deliver to Ashland  and  Marathon,  no later than June 15,  2005,  a
report,  in form and substance  reasonably  satisfactory to each of Ashland
and Marathon and consistent with the Engagement Letter dated as of November
24,  2003,  among  Ashland,  Marathon  and  Deloitte & Touche LLP.  Each of
Ashland  and  Marathon  shall,  and  shall  cause  each  of its  affiliates
(including MAP) to, cooperate with Deloitte & Touche LLP in connection with
the  preparation  of such  report,  which  cooperation  shall  include  the
provision  of  any  relevant  books,   records,   documentation  and  other
information  and the making  available of its employees  and  facilities as
Deloitte & Touche LLP may reasonably request.

                  SECTION 7.05.  Cooperation  and Exchange of  Information.
(a) Each of Marathon  and New Ashland Inc.  shall,  and shall cause each of
its affiliates to,  cooperate  fully with all reasonable  requests from the
other party in all matters  relating  to Taxes  covered by this  Agreement,
including without limitation, in connection with the preparation and filing
of Tax Returns,  any amendments or claims for Refund with respect  thereto,
the conduct and resolution of Tax Claims and the implementation of this TMA
(including,  without limitation, the provisions of Articles V and VI). Such
cooperation shall include (i) provision on a mutually convenient basis upon
reasonable request of Tax Returns,  books,  records (including  information
regarding  ownership  and Tax basis of property),  documentation  and other
information  related  to  such  Tax  Returns  and  Tax  Claims,   including
accompanying  schedules,  related work  papers,  and  documents  related to
rulings or other  determinations by Tax Authorities,  (ii) the execution of
any document or the  certification of any information that may be necessary
or beneficial  in  connection  with the filing of any Tax Returns or claims
for Refund or the conduct or resolution of any Tax Claim,  (iii)  obtaining
any document or  information  that is necessary or beneficial in connection
with the foregoing,  (iv) upon reasonable request,  the making available of
its employees and facilities on a reasonable and mutually  convenient basis
to facilitate the foregoing and (v) the reasonable good faith effort of New
Ashland  Inc. to provide to Marathon  information  reasonably  requested by
Marathon for the preparation of its published financial statements.

                  (b) Marathon and New Ashland Inc. shall meet regularly to
review  major  issues  with  respect to Tax Claims and the status of audits
with respect to  Pre-Closing  Periods and  Straddle  Periods as long as the
relevant   statute  of  limitations   remains  open  with  respect  to  any
Pre-Closing  Period  or  Straddle  Period.  New  Ashland  Inc.  shall  make
available  appropriate  personnel to discuss the foregoing  items and shall
make available for inspection relevant documents relating to such audits.

                  SECTION 7.06. [Intentionally Omitted]

                  SECTION  7.07.  Ownership  of Tax  Records;  Retention of
Information.  New Ashland Inc.  shall own,  and have all rights,  title and
interest in, all books,  records,  documentation  and other  information in
existence  as of the Closing Date related to any Tax or Tax Item of Ashland
or any of its  subsidiaries.  New  Ashland  Inc.  agrees to retain  all Tax
Returns,  related schedules and workpapers,  and all other material records
and other documents as required under Code Section 6001 and the regulations
promulgated  thereunder  relating  thereto  existing  on the date hereof or
created  through the Closing Date,  until the  expiration of the statute of
limitations  (including  extensions) of the taxable years to which such Tax
Returns and other documents relate and until the Final Determination of any
payments which may be required in respect of such years under this TMA. New
Ashland Inc. shall provide to Marathon copies of any such  documentation or
information in existence as of the Closing Date related to any Marathon Tax
Matter or with  respect to items that could  result in a Tax  Detriment  to
Marathon and, as reasonably  requested by Marathon,  in connection with any
Tax Claim.  New Ashland Inc.  agrees that,  if it intends to dispose of any
such documentation or other information, it shall provide written notice to
Marathon  describing the  documentation or other information to be disposed
of 60 days prior to taking  such  action.  Marathon  shall be  entitled  to
arrange  to  take  delivery  of  the  documentation  or  other  information
described in the notice at its expense during the succeeding 60-day period.

                               ARTICLE VIII

                                 Tax Claims

                  SECTION 8.01.  Calculation  of Losses.  The amount of any
indemnification  provided  under this TMA, other then pursuant to Article V
and VI, shall be (i) increased to take account of any net Tax Loss incurred
by the  indemnified  party  arising from the receipt of indemnity  payments
hereunder  (grossed up for such  increase) and (ii) reduced to take account
of any net Tax Savings  realized by the indemnified  party arising from the
incurrence or payment of any such indemnified loss. In computing the amount
of any such Tax Loss or Tax Savings,  the indemnified party shall be deemed
to recognize  all other Tax Items before  recognizing  any Tax Item arising
from the receipt of any indemnity  payment  hereunder or the  incurrence or
payment of any indemnified loss.

                  SECTION 8.02. Procedures.  (a) Tax Claims. (i) If a party
(the "indemnified party") receives any written notice of deficiency,  claim
or adjustment or other written  notice from a Tax Authority that may result
in the indemnified party being entitled to any indemnification provided for
under this  Agreement  in respect of,  arising out of or involving an audit
proceeding,  audit inquiry,  information request,  suit, action, contest or
similar  claim made by any Tax  Authority (a "Tax Claim") such  indemnified
party shall notify the  indemnifying  party in writing  (and in  reasonable
detail) of the Tax Claim  within 10  business  days after such  indemnified
party  receives  notice or otherwise  becomes aware of the existence of the
Tax Claim; provided,  however, that failure to give such notification shall
not affect the indemnification provided under this Agreement, except to the
extent the  indemnifying  party shall have been  materially  and  adversely
prejudiced as a result of such failure.  Thereafter,  the indemnified party
shall  keep  the   indemnifying   party  apprised  of  the  status  of  any
investigation or audit and deliver to the indemnifying  party,  within five
business days' time after the indemnified  party's receipt thereof,  copies
of all notices and documents  received by the indemnified  party related to
the Tax Claim.  New Ashland  Inc.  undertakes  and agrees that it will keep
Marathon  reasonably informed of the existence and progress of any audit or
other proceeding that relates to a Pre-Closing Period with respect to which
Marathon could be liable as a successor,  under Treasury Regulation Section
1.1502-6, or otherwise.

                  (ii) If any party  receives a written  notice  from a Tax
         Authority  that may result in an  adjustment  in the amount of the
         Specified  Liability  Deductions for a taxable year as a result of
         an audit of the New Ashland Inc.  Affiliated Group or the Marathon
         Affiliated  Group,  then for purposes of this TMA,  such audit and
         related  proceeding,  to the extent they concern the amount of the
         Specified Liability Deductions claimed or capable of being claimed
         by Marathon or the Marathon Group as successor to HoldCo, shall be
         treated  as a Tax Claim  with  respect  to which  Marathon  is the
         indemnified party and New Ashland Inc. is the indemnifying  party,
         provided,  however,  that the  resolution of such issues shall not
         preclude  Marathon from  compromising or -------- ------- settling
         any other issues in its Tax Returns  administratively with any Tax
         Authority  and  Marathon  shall have the right to determine in its
         sole reasonable  discretion the appropriate  forum and location of
         any  judicial  proceeding  with  respect  to  Specified  Liability
         Deductions.

                  (b) Assumption. Except as provided in Section 8.02(c) and
(e) of this TMA, if a Tax Claim is made against an indemnified  party,  the
indemnifying  party shall be entitled to participate in the defense thereof
and, if it so  chooses,  to assume the defense  thereof  with  professional
advisors and counsel selected by the indemnifying party; provided, however,
that such professional  advisors or counsel are not reasonably  objected to
by the indemnified party.  Should the indemnifying party so elect to assume
the defense of a Tax Claim, the  indemnifying  party shall not be liable to
the  indemnified   party  for  any  fees  or  expenses   relating  to  such
professional  advisors or counsel subsequently  incurred by the indemnified
party in connection with the defense  thereof.  If the  indemnifying  party
assumes  such  defense,  the  indemnified  party  shall  have the  right to
participate in the defense thereof and to employ professional  advisors and
counsel (not reasonably objected to by the indemnifying  party), at its own
expense,  separate from the  professional  advisors and counsel employed by
the indemnifying  party, it being  understood that the  indemnifying  party
shall control such defense.  The indemnifying party shall be liable for the
fees and  expenses of  professional  advisors  and counsel  employed by the
indemnified  party for any period during which the  indemnifying  party has
not assumed the  defense  thereof.  If the  indemnifying  party  chooses to
defend  or  prosecute  a Tax  Claim,  all  the  indemnified  parties  shall
cooperate in the defense or prosecution  thereof.  Such  cooperation  shall
include the  retention  and (upon the  indemnifying  party's  request)  the
provision to the  indemnifying  party of records and  information  that are
reasonably  relevant to such Tax Claim,  making  employees  available  on a
mutually convenient basis to provide additional information and explanation
of any  material  provided  hereunder,  cooperating  and  assisting  in the
investigation,  defense and resolution of such matters and providing  legal
and business  assistance  with respect to such matters.  Whether or not the
indemnifying  party  assumes  the defense of a Tax Claim,  the  indemnified
party shall not admit any liability with respect to, or settle,  compromise
or discharge, such Tax Claim without the indemnifying party's prior written
consent.  If the indemnifying party assumes the defense of a Tax Claim, the
indemnified party shall agree to any settlement,  compromise,  or discharge
of a Tax Claim that the  indemnifying  party may  recommend and that by its
terms  obligates  the  indemnifying  party  to pay the full  amount  of the
liability  in  connection  with  such  Tax  Claim;  provided  that  if such
settlement,  compromise  or discharge  imposes  conditions,  costs or other
detriments (in addition to the liability in connection with such Tax Claim)
upon the indemnified  party,  such indemnified party may use its reasonable
judgment  in  determining  whether to so agree,  such  agreement  not to be
unreasonably withheld.

                  (c) Joint rights and assumption of control. If a party to
this  TMA  suffers  a  Bankruptcy  Event,  then  the  party  suffering  the
Bankruptcy  Event (the  "Bankruptcy  Party")  shall  vigorously  pursue the
assertion,  or defense (as the case may be) of all Tax Claims for which any
other party to this TMA (the  "Non-Bankruptcy  Party") might be jointly and
severally,  directly or indirectly liable ("Bankruptcy Tax Claims") and the
Non-Bankruptcy  Party shall have the right to participate in the defense of
any Bankruptcy Tax Claims and to employ  professional  advisors and counsel
(not reasonably  objected to by the Bankruptcy  Party), at its own expense,
separate  from  the  professional  advisors  and  counsel  employed  by the
Bankruptcy  Party,  it being  understood  that the  Bankruptcy  Party shall
control  the  defense  of such  claims.  Both  parties  shall in good faith
cooperate with one another and the Bankruptcy  Party shall not unreasonably
reject any suggestions made by the  Non-Bankruptcy  Party. Such cooperation
shall include the retention and (upon the  Non-Bankruptcy  Party's request)
the provision to the  Non-Bankruptcy  Party of records and information that
are reasonably  relevant to such Bankruptcy Tax Claims (including copies of
all  protests,  pleadings,  briefs,  filings,  correspondence  and  similar
materials  relative  to  such  claims),  making  employees  available  on a
mutually convenient basis to provide additional information and explanation
of any  material  provided  hereunder,  cooperating  and  assisting  in the
investigation,  defense and resolution of such matters, and providing legal
and  business  assistance  with  respect  to such  matters.  The  preceding
sentences of this Section 8.02(c) notwithstanding,  if the Bankruptcy Party
fails to vigorously  pursue such Bankruptcy Tax Claims,  or such Bankruptcy
Party is  discharged,  or otherwise  effectively  barred from liability for
such Bankruptcy Tax Claims, the  Non-Bankruptcy  Party shall have the right
to assume full control over the defense of such  Bankruptcy Tax Claims and,
if  such  control  is  assumed,  the  Bankruptcy  Party  shall  irrevocably
designate,  and  agree  to  cause  each  of  its  affiliates  to  designate
irrevocably,  the Non-Bankruptcy  Party as the sole and exclusive agent and
attorney-in-fact to take any action as such  Non-Bankruptcy  Party may deem
appropriate,  necessary,  or incidental in any and all matters  relating to
Pre-Closing Period Tax Claims of the Ashland Group and the Bankruptcy Party
shall continue to cooperate  fully in the defense or  prosecution  thereof,
but it shall not have the right to participate in the proceedings.

                  (d)  Mitigation.  New Ashland  Inc.  and  Marathon  shall
cooperate  with each other with respect to resolving any claim or liability
with respect to which one party is  obligated to indemnify  the other party
hereunder,  including by making  reasonable  efforts to mitigate or resolve
any such claim or liability,  which shall include  claiming any indemnified
loss as a deduction  or offset on any relevant  Tax Return  (including  any
amended Tax Return).  In the event that New Ashland Inc. or Marathon  shall
fail to make such  reasonable  efforts to  mitigate or resolve any claim or
liability,  then  notwithstanding  anything else to the contrary  contained
herein,  the other party shall not be required to indemnify  any person for
any indemnified loss that could reasonably be expected to have been avoided
if New Ashland Inc. or Marathon, as the case may be, had made such efforts.

                  (e) Marathon Participation Rights with respect to Section
355(e) Tax Claims.  Unless otherwise agreed to by the parties,  New Ashland
Inc.  shall  control  the  defense of all Tax Claims  made with  respect to
Section  355(e) Taxes (a "Section  355(e) Tax Claim") and shall  vigorously
pursue  the  defense  of such  claims.  Marathon  shall  have the  right to
participate  in the defense of all Section  355(e) Tax Claims and to employ
professional  advisors  and  counsel  (not  reasonably  objected  to by New
Ashland Inc.), at its own expense,  separate from the professional advisors
and counsel  employed by New Ashland Inc.  Both parties shall in good faith
cooperate  with one  another and New Ashland  Inc.  shall not  unreasonably
reject any suggestions made by Marathon. Such cooperation shall include the
retention  and (upon  Marathon's  request) the provision to the Marathon of
records and information that are reasonably relevant to such Section 355(e)
Tax Claims (including copies of all protests,  pleadings,  briefs, filings,
correspondence  and  similar  materials  relative to such  claims),  making
employees  available on a mutually  convenient basis to provide  additional
information and explanation of any material provided hereunder, cooperating
and assisting in the investigation, defense and resolution of such matters,
and providing  legal and business  assistance with respect to such matters.
New Ashland Inc.  shall not admit any liability with respect to, or settle,
compromise  or  discharge  any Section  355(e) Tax Claim  without the prior
written consent of Marathon, such consent not to be unreasonably withheld.

                  SECTION 8.03. Treatment of Indemnification  Payments. The
parties agree that any indemnity  payments made pursuant to this  Agreement
or pursuant to Article  XIII of the Master  Agreement  shall be treated for
all Tax purposes as distributions or capital contributions, as the case may
be,  between  HoldCo and New Ashland  Inc.  made  immediately  prior to the
Spinoff and,  accordingly,  not as taxable  income to the recipient or as a
deductible  expense  to the payor,  unless  otherwise  required  by a Final
Determination or the Closing Agreement.

                                ARTICLE IX

                        Dispute Resolution; Interest

                  SECTION  9.01.  Dispute  Resolution.  In the  event  that
Marathon or any member of the  Marathon  Group,  as the case may be, on the
one hand, and New Ashland Inc. or any member of the New Ashland Inc. Group,
as the case  may be,  on the  other  hand,  disagree  as to the  amount  or
calculation of any payment to be made under this TMA, or the interpretation
or application  of any provision  under this TMA, the parties shall attempt
in good faith to resolve  such  dispute.  If such  dispute is not  resolved
within sixty (60) business days following the  commencement of the dispute,
Marathon and New Ashland Inc.  shall jointly  retain a tax attorney who has
retired  from  active  practice  in a  nationally  recognized  law  firm or
independent  public  accounting  firm,  which firm is  independent  of both
parties,  or a  retired  Federal  judge  experienced  in Tax  Matters  (the
"Independent Entity"), to resolve the dispute. If the parties are unable to
agree on an Independent  Entity, then each party shall appoint a person who
would qualify as an  Independent  Entity (but for the approval of the other
party),  and such  persons  shall then appoint a person who meets the above
description  as  the  Independent   Entity  and  who  shall  serve  as  the
Independent  Entity.  The Independent  Entity shall act as an arbitrator to
resolve  all points of  disagreement  and its  decision  shall be final and
binding  upon  all  parties   involved.   Following  the  decision  of  the
Independent  Entity,  Marathon,  and members of the Marathon Group, and New
Ashland Inc.  and members of the New Ashland Inc.  Group shall each take or
cause to be taken any action  necessary  to  implement  the decision of the
Independent  Entity.  The fees and  expenses  relating  to the  Independent
Entity shall be borne equally by Marathon and New Ashland Inc.

                  SECTION 9.02.  Interest.  Any payment required to be made
under this TMA that is not made on or before the date on which such payment
is due shall bear interest computed at the rate specified from time to time
pursuant to Code Section 6621(a)(2).

                                 ARTICLE X

                             General Provisions

                  SECTION  10.01.   Termination.   This   Agreement   shall
terminate  simultaneous  with  any  termination  of  the  Master  Agreement
pursuant  to  Article  XI  thereof.  In the  event of  termination  of this
Agreement,  this Agreement shall forthwith  become void and have no effect,
without any liability or obligation on the part of any party hereto.

                  SECTION 10.02. Survival. Notwithstanding anything in this
TMA to the contrary  apart from Section  10.01,  the provisions of this TMA
shall survive for 30 days after the full period of all applicable  statutes
of  limitations  (giving  effect to any  waiver,  mitigation  or  extension
thereof) unless by their term they expire at an earlier date.

                  SECTION 10.03. Right of Set-off. Either party may set-off
any amount to which it is entitled under this TMA against amounts otherwise
payable hereunder by such party. Neither the exercise of nor the failure to
exercise  such right of set-off will  constitute an election of remedies or
limit  such party in any manner in the  enforcement  of any other  remedies
that may be available to it.

                  SECTION 10.04.  Notices. All notices,  requests,  claims,
demands and other  communications  under this Agreement shall be in writing
and shall be deemed  given  upon  receipt by the  parties at the  following
addresses  (or at such other  address for a party as shall be  specified by
like notice):

                  if to the Ashland Parties, to:

                  Ashland Inc.
                  50 E. RiverCenter Boulevard
                  Covington, KY 41012-0391

                           Attention:    J. Marvin Quin
                                         David L. Hausrath, Esq.

                           Facsimile:    (859) 815-5053

                           with a copy to:

                           Cravath, Swaine & Moore LLP
                           Worldwide Plaza
                           825 Eighth Avenue
                           New York, NY 10019-7474
                           Attention:    Stephen L. Gordon, Esq.

                  if to the Marathon Parties, to:

                  Marathon Oil Corporation
                  5555 San Felipe Road
                  Houston, TX 77056

                           Attention:    Raja Sahni
                                         Richard L. Horstman, Esq.

                           Facsimile:    (713) 513-4172

                           with copies to:

                           Baker Botts L.L.P.
                           One Shell Plaza
                           Houston, TX 77002-4995
                           Attention:  Theodore W. Paris, Esq.

                           Miller & Chevalier Chartered
                           655 Fifteenth Street, N.W.
                           Washington, DC 20005-5701
                           Attention:    Daniel W. Luchsinger, Esq.

                  SECTION 10.05.  Interpretation.  When a reference is made
in this  Agreement to a Section,  such  reference  shall be to a Section of
this Agreement unless otherwise  indicated.  The headings contained in this
Agreement are for  reference  purposes only and shall not affect in any way
the  meaning  or  interpretation  of this  Agreement.  Whenever  the  words
"include", "includes" or "including" are used in this Agreement, they shall
be deemed to be followed by the words "without limitation".  This Agreement
is intended to calculate, allocate and assign certain Tax responsibilities,
liabilities  and  benefits  among the  parties to this  Agreement,  and any
situation or  circumstance  concerning  such  calculation,  allocation  and
assignment  that is not  specifically  contemplated  hereby or provided for
herein  shall be  determined  in a manner  consistent  with the  underlying
principles of calculation, allocation and assignment in this Agreement.

                  SECTION  10.06.  Severability.   If  any  term  or  other
provision  of this  Agreement  is invalid,  illegal or  incapable  of being
enforced by any rule or law, or public  policy,  all other  conditions  and
provisions of this Agreement  shall  nevertheless  remain in full force and
effect  so long as the  economic  or legal  substance  of the  transactions
contemplated hereby is not affected in any manner materially adverse to any
party. Upon such determination that any term or other provision is invalid,
illegal or incapable of being enforced,  the parties hereto shall negotiate
in good faith to modify this Agreement so as to effect the original  intent
of the  parties  as closely as  possible  to the end that the  transactions
contemplated hereby are fulfilled to the extent possible.

                  SECTION  10.07.  Counterparts.   This  Agreement  may  be
executed in one or more counterparts,  all of which shall be considered one
and  the  same  agreement  and  shall  become  effective  when  one or more
counterparts  have been signed by each of the parties and  delivered to the
other parties.

                  SECTION  10.08.   No  Third-Party   Beneficiaries.   This
Agreement  is not intended to confer upon any person other than the parties
hereto any rights or remedies.

                  SECTION 10.09. Existing MAP Agreements. To the extent any
provision of this TMA conflicts with the determination of the Tax Liability
(as defined in the MAP LLC  Agreement) of Ashland or its successors for any
Straddle  Period of MAP as  determined  under  Section 10.03 of the MAP LLC
Agreement,  such Tax Liability  shall be determined in accordance with this
Agreement. In all other respects,  except as expressly modified herein, the
terms and conditions of the MAP LLC  Agreement,  the ATCA, and the Put/Call
Agreement  shall continue to apply to the extent provided in Article XII of
the Master Agreement. For the avoidance of doubt, the term Tax Distribution
Amount (as  defined in the MAP LLC  Agreement)  shall not  include  the Tax
Liability (as defined in the MAP LLC  Agreement) of the Ashland  Affiliated
Group that is attributable to the MAP Partial Redemption.

                  SECTION 10.10.  Continuing Ashland  Participation  Rights
With Respect To Pre-Closing Pass-Through Items. Notwithstanding anything to
the  contrary  in  the  Master  Agreement,  this  Agreement  or  the  other
Transaction  Agreements and Ancillary  Agreements (as defined in the Master
Agreement),  New Ashland Inc. and its successors shall retain the right (to
the extent  provided  for in Section  6.08 of the MAP LLC  Agreement or any
other provision of the MAP LLC Agreement) to participate in the preparation
and filing of all Tax  Returns,  and in the defense of any Tax Claim,  with
respect to all Pass-Through Items relating to any Pre-Closing Period of MAP
or any other JV Entity as if it were a member of MAP or such JV Entity. Any
Tax Claim with respect to any issue concerning MAP's income,  gain, losses,
deductions  or  credits  that  could  result  in  additional  Taxes for the
Pre-Closing  Period for Ashland and additional basis (other than additional
basis  that is subject to  Section  4.03 of the TMA) or  deductions  in the
Post-Closing  Period for Marathon or any member of the Marathon Group shall
be treated under Section  6.08(e)(ii)  of the MAP LLC Agreement as an issue
the tax effect of which, if resolved adversely would be, and the tax effect
of settling the issue is, not proportionately the same for both Members. If
an issue is treated as not  proportionately the same for both Members under
the preceding sentence, then in applying Section 6.08(e)(iv) of the MAP LLC
Agreement,  nationally  recognized  tax counsel (whose  selection  shall be
based on the principles of Section 9.01 of the TMA) shall  determine if the
settlement is fair to both Members  based on the merits of the issue.  Such
fees of the  nationally  recognized  tax  counsel  shall be shared,  62% by
Marathon and 38% by New Ashland Inc.

                  SECTION 10.11.  Prior Tax Sharing  Agreements.  Except as
specifically  provided  in Section  10.09,  as of the  Closing  Date,  this
Agreement  supersedes  and  terminates  all  prior  agreements  as  to  the
allocation of tax liabilities  among the members of the Ashland Group,  and
after the Closing Date neither HoldCo nor any member of the Marathon Group,
as successor,  transferee or otherwise,  shall be bound thereby or have any
liability thereunder.

                  SECTION  10.12.   Entire  Agreement;   Amendments.   This
Agreement embodies the entire  understanding  among the parties relating to
its subject matter. Any and all prior  correspondence,  conversations,  and
memoranda  are  merged  herein  and  shall be  without  effect  hereon.  No
promises,  covenants,  or  representations  of any kind,  other  than those
expressly  stated  herein,  have been made to induce  either party to enter
into this  Agreement.  This Agreement  shall not be amended,  supplemented,
modified,  or  terminated  except by a writing  duly  signed by each of the
parties hereto,  and no waiver of any provisions of this Agreement shall be
effective unless in a writing duly signed by the party sought to be bound.

                  SECTION  10.13.  Amendments  Resulting  From  Pre-Closing
Change In Tax Structure. If, prior to the Closing, the Tax Structure of the
Transactions is modified,  revised or changed in any manner, for any reason
(including,  but  not  limited  to,  modifications,  revisions  or  changes
resulting from changes in law or in response to communications  (written or
otherwise)  with the IRS or any  other Tax  Authority),  the  parties  will
negotiate in good faith to amend this Agreement,  to the extent  necessary,
to  reflect  the  underlying  principles  of  calculation,  allocation  and
assignment in this Agreement.

                  SECTION  10.14.  Payments.  All  payments  under this TMA
shall be made by wire transfer in immediately available funds.

                  SECTION  10.15.  Successors.   This  Agreement  shall  be
binding  upon  and  inure to the  benefit  of any  successor  to any of the
parties, by merger,  acquisition of assets or otherwise, to the same extent
as if the successor  had been an original  party to the  Agreement,  and in
such event,  all  references  herein to a party shall refer  instead to the
successor of such party.

                  SECTION  10.16.  Confidentiality.   Each  party  to  this
Agreement   shall  hold,  and  cause  its  officers,   employees,   agents,
consultants,  and advisors to hold, in strict confidence,  unless compelled
to disclose by judicial or administrative process or, in the opinion of its
counsel,  by other  requirements of law, all information  that it or any of
its  officers,  employees,  agents,  consultants,  and advisors may acquire
pursuant to, or in the course of  performing  its  obligations  under,  any
provision of this Agreement.

                  SECTION 10.17.  Governing  Law. This  Agreement  shall be
governed by, and construed in accordance with, the laws of the State of New
York,  regardless of the laws that might otherwise  govern under applicable
principles of conflicts of laws thereof.



IN WITNESS WHEREOF, each of the parties has caused this Agreement to be executed by its respective duly authorized officer as of the date first set forth above. ASHLAND INC., by /s/ James J. O'Brien --------------------------------------------- Name: James J. O'Brien Title: Chief Executive Officer ATB HOLDINGS INC., by /s/ James J. O'Brien --------------------------------------------- Name: James J. O'Brien Title: President EXM LLC, by --------------------------------------------- ATB HOLDINGS INC., by /s/ James J. O'Brien --------------------------------------------- Name: James J. O'Brien Title: President NEW EXM INC., by /s/ James J. O'Brien --------------------------------------------- Name: James J. O'Brien Title: President MARATHON OIL CORPORATION, by /s/ Janet F. Clark --------------------------------------------- Name: Janet F. Clark Title: Senior Vice President and Chief Financial Officer MARATHON OIL COMPANY, by /s/ Janet F. Clark --------------------------------------------- Name: Janet F. Clark Title: Senior Vice President MARATHON DOMESTIC LLC, by --------------------------------------------- MARATHON OIL CORPORATION, by /s/ Janet F. Clark --------------------------------------------- Name: Janet F. Clark Title: Senior Vice President and Chief Financial Officer MARATHON ASHLAND PETROLEUM LLC, by /s/ Anthony R. Kenney --------------------------------------------- Name: Anthony R. Kenney Title: Vice President

                                                                EXHIBIT 2.3

                                                              CONFORMED COPY




                       AMENDMENT  NO. 3 dated as of April  27,  2005  (this
                  "Amendment"),   to  the  Amended  and  Restated   Limited
                  Liability Company Agreement dated as of December 31, 1998
                  (the "MAP LLC Agreement") of Marathon  Ashland  Petroleum
                  LLC (the  "Company"),  by and  between  Ashland  Inc.,  a
                  Kentucky   corporation   ("Ashland")   and  Marathon  Oil
                  Company, an Ohio corporation ("Marathon"), a wholly owned
                  subsidiary  of  Marathon  Oil  Corporation,   a  Delaware
                  Corporation ("Marathon Corporation").


                  WHEREAS  Ashland and Marathon are the only Members of the
Company  and are  parties  to the MAP LLC  Agreement,  which sets forth the
rights and responsibilities of each of them with respect to the governance,
financing  and  operation  of the Company  (capitalized  terms used in this
Amendment and not defined  herein shall have the meanings  given such terms
in the MAP LLC Agreement, as amended);

                  WHEREAS  Marathon  Corporation,  Marathon,  Ashland,  New
Ashland Inc.,  certain of their  respective  affiliates and the Company are
parties to a Master Agreement, pursuant to which the parties have agreed to
effect the Transactions described therein;

                  WHEREAS the parties have entered into  Amendment No. 1 to
the Master Agreement,  dated April 27, 2005,  amending certain terms of the
Master Agreement;

                  WHEREAS  Marathon  Corporation,  Marathon,  Ashland,  New
Ashland Inc. and certain of their  respective  affiliates are parties to an
Amended and Restated  Tax Matters  Agreement,  dated April 27, 2005,  which
sets forth the rights and  obligations of the parties with respect to Taxes
in connection with the Transactions;

                  WHEREAS in  connection  with the MAP Partial  Redemption,
Marathon  and  Ashland  wish to  adjust  the  Percentage  Interests  of the
Members;

                  WHEREAS the Members  wish to amend the MAP LLC  Agreement
to facilitate the Transactions.

                  NOW, THEREFORE, in consideration of the mutual agreements
herein contained and other good and valuable consideration, the sufficiency
and receipt of which are hereby  acknowledged,  the parties hereto agree as
follows:

                  SECTION  1.   PERCENTAGE   INTEREST   AFTER  MAP  PARTIAL
REDEMPTION

                  Effective  as of the  date  of  this  Amendment,  Section
3.01(b) of the MAP LLC  Agreement  (as  amended) is amended and restated as
follows:

                  (b) Immediately following the MAP Partial Redemption, the
respective  Percentage Interests of Ashland and Marathon will be determined
as  follows:   Ashland's  Percentage  Interest  will  equal  the  quotient,
expressed as a percentage,  of (x) $3.815  billion plus the MAP  Adjustment
Amount  (as  defined  in  the  Master  Agreement)  minus  the  MAP  Partial
Redemption  Amount  (as  defined in the  Master  Agreement)  divided by (y)
$10.039  billion plus 100% of the  Distributable  Cash of the Company as of
the  Closing  Date  minus the MAP  Partial  Redemption  Amount.  Marathon's
Percentage  Interest will equal 100% minus Ashland's  Percentage  Interest.
The Percentage  Interests of the Members will be appropriately  adjusted if
the MAP Partial  Redemption Amount is increased in accordance with Sections
1.01 or 1.06 of the Master Agreement.

                  SECTION 2. COMPANY LEVERAGE POLICY

                  The Company  Leverage Policy (set forth in Schedule 8.14)
is amended and restated in its entirety.  Such policy is set forth in a new
Schedule 8.14 attached hereto.

                  SECTION 3. RECEIVABLES PURCHASE AND SALE AGREEMENT

                  The Receivables Purchase and Sale Agreement (set forth in
Attachment B) is amended and restated in its entirety.  Such  agreement and
exhibits thereto are set forth in a new Attachment B attached hereto.

                  SECTION 4. PARTIES IN INTEREST This Amendment shall inure
to the  benefit  of,  and be binding  upon,  the  parties  hereto and their
respective successors, legal representatives and permitted assigns.

                  SECTION 5. COUNTERPARTS This Amendment may be executed in
counterparts,  each of which shall be deemed an original,  but all of which
together shall constitute one and the same instrument.

                  SECTION 6. GOVERNING LAW THIS AMENDMENT SHALL BE GOVERNED
BY AND  CONSTRUED  IN  ACCORDANCE  WITH THE LAWS OF THE STATE OF  DELAWARE,
WITHOUT  GIVING EFFECT TO THE  PRINCIPLES OF CONFLICTS OF LAW THEREOF.  ANY
RIGHT TO TRIAL BY JURY WITH RESPECT TO ANY CLAIM OR  PROCEEDING  RELATED TO
OR  ARISING  OUT OF  THIS  AMENDMENT,  OR ANY  TRANSACTION  OR  CONDUCT  IN
CONNECTION HEREWITH, IS WAIVED.

                  SECTION 7. NO THIRD-PARTY BENEFICIARIES This Amendment is
not  intended to confer upon any person  other than the parties  hereto any
rights or remedies.

                  SECTION 8.  INTERPRETATION The headings contained in this
Amendment are for  reference  purposes only and shall not affect in any way
the  meaning  or  interpretation  of this  Amendment.  Whenever  the  words
"include", "includes" or "including" are used in this Agreement, they shall
be deemed to be followed by the words "without limitation".

                  SECTION 9. SEVERABILITY If any term or other provision of
this  Amendment is invalid,  illegal or incapable of being  enforced by any
rule or law, or public policy,  all other conditions and provisions of this
Amendment shall nevertheless remain in full force and effect so long as the
economic or legal substance of the transactions and amendments contemplated
hereby is not affected in any manner materially  adverse to any party. Upon
such determination that any term or other provision is invalid,  illegal or
incapable of being  enforced,  the parties  hereto shall  negotiate in good
faith to modify this  Amendment so as to effect the original  intent of the
parties  as  closely  as  possible  to the end  that the  transactions  and
amendments contemplated hereby are fulfilled to the extent possible.

                  SECTION 10. CONTINUATION OF MAP LLC AGREEMENT The MAP LLC
Agreement  continues in full force and effect,  except as expressly amended
herein.

                  SECTION  11.   CONSEQUENCES   OF  TERMINATION  OF  MASTER
AGREEMENT In the event of a termination of the Master Agreement pursuant to
Section 11.01 of the Master  Agreement,  the parties further agree that, as
of the date the Master  Agreement is terminated the Company Leverage Policy
(set forth in Schedule  8.14) shall be amended and restored to its language
existing  prior to the  execution  of  Amendment  No. 2 to the  Amended and
Restated Limited Liability Company Agreement, dated March 18, 2004.




IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the day and year first written above. MARATHON OIL COMPANY, By /s/ Janet F. Clark ----------------------------- Name: Janet F. Clark Title: Senior Vice President ASHLAND INC., By /s/ James J. O'Brien ----------------------------- Name: James J. O'Brien Title: Chief Executive Officer