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                                    Exhibit 12

                                MOBIL CORPORATION
                COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES 
                     (In millions, except for ratio amount) 
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                                             Year Ended December 31,
                                    ---------------------------------------
                                      1990    1991    1992    1993     1994
                                    ------  ------  ------  ------   ------
                                                      
Income Before Change in   
  Accounting Principle(s) ........  $1,929  $1,920  $1,308  $2,084   $1,759
Add:
  Income taxes ...................   2,515   2,105   1,567   1,931    1,919  
  Portion of rents representative
    of interest factor ...........     342     344     319     339      340
  Interest and amortization
    of debt discount expense .....     700     713     612     529(a)   461   
  Earnings (greater) less 
    than dividends from 
    equity affiliates ............    (100)   (151)     36     265      (40)
                                    ------  ------  ------  ------   ------
Income as Adjusted ...............  $5,386  $4,931  $3,842  $5,148   $4,439    
                                    ======  ======  ======  ======   ======

Fixed Charges:
  Interest and amortization 
    of debt discount expense .....  $  700  $  713  $  612  $  529(a)$  461    
  Capitalized interest ...........       7      20      42      42       37
  Portion of rents representative
    of interest factor ...........     342     344     319     339      340
                                    ------  ------  ------  ------   ------
Total Fixed Charges ..............  $1,049  $1,077  $  973  $  910   $  838
                                    ======  ======  ======  ======   ======

Ratio of Earnings to Fixed Charges     5.1     4.6     3.9     5.7(a)   5.3    
                                    ------  ------  ------  ------   ------



For the years ended December 31, 1990, 1991, 1992, 1993 and 1994, Fixed Charges 
exclude $42 million, $42 million, $37 million, $31 million and $37 million,
respectively, of interest expense attributable to debt issued by the Mobil Oil
Corporation Employee Stock Ownership Plan Trust and guaranteed by Mobil.

(a) Excludes the favorable effect of $205 million of interest benefits from 
    the resolution of prior-period tax issues.

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Mobil                            - 25 -