1 EXHIBIT 12 SHELL OIL COMPANY AND SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (MILLIONS OF DOLLARS) YEARS ENDED DECEMBER 31 -------------------------------------------------- 1993 1992 1991 1990 1989 ------ ------ ------ ------ ------ Income before provisions for income taxes and including amounts applicable to unconsolidated subsidiaries................. $ 923 $ 476 $ 47 $1,550 $2,067 Add: Interest and discount amortization on indebtedness............................. 213 268 297 371 401 Portion of rentals representative of interest(1).............................. 113 114 119 107 119 Amortization of interest capitalized........ 40 44 35 32 32 ------ ------ ------ ------ ------ Income as adjusted............................ $1,289 $ 902 $ 498 $2,060 $2,619 ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ Fixed charges: Interest and discount amortization on indebtedness............................. $ 213 $ 268 $ 297 $ 371 $ 401 Portion of rentals representative of interest(1).............................. 113 114 119 107 119 Capitalized interest........................ 2 -- -- -- 21 ------ ------ ------ ------ ------ Total fixed charges........................... $ 328 $ 382 416 $ 478 $ 541 ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ Ratio of earnings to fixed charges............ 3.9 2.4 1.2 4.3 4.8 ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ - --------------- (1) Calculated as one-third of rental expense. 64