EXHIBIT 12(A)

                          AMOCO ARGENTINA OIL COMPANY
                            ------------------------

                STATEMENT SETTING FORTH COMPUTATION OF RATIO OF
                           EARNINGS TO FIXED CHARGES
                      (MILLIONS OF DOLLARS, EXCEPT RATIOS)



                                                SIX MONTHS         YEAR ENDED DECEMBER 31,
                                                ENDED JUNE    ---------------------------------
                                                 30, 1995     1994   1993   1992   1991   1990
                                               ------------   -----  -----  -----  -----  -----
                                                                        
Determination of Income:
  Consolidated earnings before income taxes
   and minority interest.....................     $52.6       $  86  $ 110  $  96  $ 195  $ 151
  Fixed charges expensed by consolidated
   companies.................................       3.7           5   --     --     --     --
  Adjustments for certain companies accounted
   for by the equity method..................     --           --     --     --     --     --
                                                  -----       -----  -----  -----  -----  -----
Adjusted earnings plus fixed charges.........     $56.3       $  91  $ 110  $  96  $ 195  $ 151
                                                  -----       -----  -----  -----  -----  -----
                                                  -----       -----  -----  -----  -----  -----
Determination of Fixed Charges:
  Consolidated interest on indebtedness
   (including interest capitalized)..........     $ 3.7       $   5  $--    $--    $--    $--
  Consolidated rental expense representative
   of an interest factor.....................     --           --     --     --     --     --
  Adjustments for certain companies accounted
   for by the equity method..................     --           --     --     --     --     --
                                                  -----       -----  -----  -----  -----  -----
Total fixed charges..........................     $ 3.7       $   5  $--    $--    $--    $--
                                                  -----       -----  -----  -----  -----  -----
                                                  -----       -----  -----  -----  -----  -----

Ratio of earnings to fixed charges...........      15.2        18.2    N/A    N/A    N/A    N/A