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.