EXHIBIT 8(b)

              [Skadden, Arps, Slate, Meagher & Flom LLP Letterhead]

                                                                April 2, 1999

Mobil Corporation
3225 Gallows Road
Fairfax, Virginia  22307

Ladies and Gentlemen:

     We have acted as counsel to Mobil Corporation, a Delaware corporation
("Mobil"), in connection with (i) the Merger, as defined and described in the
Agreement and Plan of Merger, dated as of December 1, 1998 (the "Merger
Agreement"), among Mobil, Exxon Corporation, a New Jersey corporation ("Exxon")
and Lion Acquisition Subsidiary Corporation, a Delaware corporation and a
newly-formed, wholly-owned subsidiary of Exxon ("Merger Subsidiary"), and (ii)
the preparation and filing of the Registration Statement on Form S-4 (the
"Registration Statement"), which includes the Proxy Statement/Prospectus (the
"Proxy Statement/Prospectus"), filed with the Securities and Exchange Commission
(the "Commission") under the Securities Act of 1933, as amended (the "Securities
Act") and the Securities Exchange Act of 1934, as amended. Unless otherwise
indicated, each capitalized term used herein has the meaning ascribed to it in
the Merger Agreement.

     In connection with this opinion, we have examined the Merger Agreement, the
Proxy Statement/Prospectus and such other documents and corporate records as we
have deemed necessary or appropriate in order to enable us to render the opinion
below. For purposes of this opinion, we have assumed (i) the validity and
accuracy of the documents and corporate records that we have examined, and the
facts and representations concerning the Merger that have come to our attention
during our engagement, and (ii) that the Merger will be consummated in the
manner described in the Merger Agreement and the Proxy Statement/Prospectus.

     Subject to the assumptions set forth above, the representations made to us
by Mobil, Exxon and Merger Subsidiary in their respective letters dated the date
hereof and the assumptions and qualifications set forth in the discussion in the
Proxy Statement/Prospectus under the heading "Material Federal Income Tax
Consequences of the Merger", in our opinion, the Merger will be treated for
federal income tax purposes as a reorganization qualifying under the provisions
of Section 368(a) of the Code and each of Exxon, Merger Subsidiary and Mobil
will be a party to the reorganization within the meaning of Section 368(b) of
the Code, and accordingly, for U.S. federal income tax purposes:

        (i) holders of Exxon stock will not recognize any gain or loss as a
     result of the Merger;

        (ii) except in respect of cash received instead of fractional shares of
     Exxon Mobil common stock, holders of shares of Mobil stock will (1) not
     recognize any gain or loss as a result of the exchange of their shares of
     Mobil stock for Exxon Mobil stock, (2) have a tax basis in the Exxon Mobil
     stock received in the Merger equal to the tax basis of the Mobil stock
     surrendered in the Merger, and (3) have a holding period with respect to
     the Exxon Mobil stock received in the Merger that includes the holding
     period of the Mobil stock surrendered in the Merger;

        (iii) a holder of Mobil common stock will be required to recognize gain
     or loss with respect to cash received instead of a fractional share of
     Exxon Mobil common stock, measured by the difference between the amount of
     cash received and the portion of the tax basis of the holder's shares of
     Mobil common stock allocable to the fractional share, which gain or loss
     will be capital gain or loss if the holder of Mobil common stock holds such
     stock as a capital asset within the meaning of Section 1221 of the Code and
     will be long-term capital gain or loss






     if the share of Mobil common stock exchanged for the fractional share was
     held for more than one year at the Effective Time;

        (iv) although the matter is not free from doubt (because of the
     absence of legislative, judicial or other authority directly on
     point), Mobil's payment of transfer taxes for which the Mobil
     shareholders are primarily liable, if any, may be taxable as a
     dividend to the Mobil shareholders; and

        (v) none of Exxon, Mobil or Merger Subsidiary will recognize gain or
     loss as a result of the Merger.

     The preceding are all of the material U.S. federal income tax
consequences of the Merger.  However, our opinion does not address U.S.
federal income tax consequences which may vary with, or are contingent
upon, a shareholder's individual circumstances.  In addition, our opinion
does not address any non-income tax or any foreign, state or local tax
consequences of the Merger.

     This opinion is delivered in accordance with the requirements of Item
601(b)(8) of Regulation S-K under the Securities Act. In rendering our opinion,
we have considered the applicable provisions of the Code, Treasury Department
regulations promulgated thereunder, pertinent judicial authorities, interpretive
rulings of the IRS and such other authorities as we have considered relevant. It
should be noted that statutes, regulations, judicial decisions and
administrative interpretations are subject to change at any time (possibly with
retroactive effect). A change in the authorities or the accuracy or completeness
of any of the information, documents, corporate records, covenants, statements,
representations or assumptions on which our opinion is based could affect our
conclusions. This opinion is expressed as of the date hereof, and we are under
no obligation to supplement or revise our opinion to reflect any changes
(including changes that have retroactive effect) (i) in applicable law or (ii)
in any information, document, corporate record, covenant, statement,
representation or assumption stated herein which becomes untrue or incorrect.

     This letter is furnished to you solely for use in connection with the
Merger, as described in the Merger Agreement and the Proxy
Statement/Prospectus, and is not to be used, circulated, quoted, or
otherwise referred to for any other purpose without our express written
permission.  In accordance with the requirements of Item 601(b)(23) of
Regulation S-K under the Securities Act, we hereby consent to the
discussion of this opinion in the Proxy Statement/Prospectus, to the filing
of this opinion as an exhibit to the Proxy Statement/Prospectus and to the
reference to our firm under the headings "THE MERGER TRANSACTION--Material
Federal Income Tax Consequences of the Merger," "THE MERGER AGREEMENT--
Conditions to the Completion of the Merger" and "LEGAL MATTERS" in the
Proxy Statement.  In giving such consent, we do not thereby admit that we
are in the category of persons whose consent is required under Section 7 of
the Securities Act or the rules and regulations of the Commission
thereunder.

                                  Very truly yours,

                                  /s/ SKADDEN, ARPS, SLATE, MEAGHER & FLOM LLP