Exhibit 12 CHEVRON CORPORATION - TOTAL ENTERPRISE BASIS COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Dollars in Millions) Nine Months Ended Year Ended December 31, ---------------------------------- September 30, 1997 1996 1995 1994 1993 1992 ------------------ ---- ---- ---- ---- ---- Net Income before Cumulative Effect of Changes in Accounting Principles (1) $2,381 $2,607 $ 930 $1,693 $1,265 $2,210 Income Tax Expense 1,875 2,624 1,094 1,322 1,389 1,508 Distributions (Less Than) Greater Than Income from Less Than 50 Percent Owned Equity Affiliates (113) 29 (5) (3) 6 (9) Minority Interest 8 4 0 3 (2) 2 Previously Capitalized Interest Charged to Earnings During Period 21 24 47 32 20 18 Interest and Debt Expense 302 471 557 453 390 490 Interest Portion of Rentals (2) 118 158 148 156 169 152 ------ ------ ------ ------ ------ ------ Earnings before Provisions for Taxes and Fixed Charges $4,592 $5,917 $2,771 $3,656 $3,237 $4,371 ====== ====== ====== ====== ====== ====== Interest and Debt Expense $302 $471 $557 $453 $390 $490 Interest Portion of Rentals (2) 118 158 148 156 169 152 Capitalized Interest 82 108 141 80 60 46 ------ ------ ------ ------ ------ ------ Total Fixed Charges $502 $737 $846 $689 $619 $688 ====== ====== ====== ====== ====== ====== Ratio of Earnings to Fixed Charges 9.15 8.03 3.28 5.31 5.23 6.35 (1) The information for 1995 and thereafter reflects the company's adoption of the Financial Accounting Standards Board Statement No. 121, "Accounting for the Impairment of Long-Lived Assets and for Long-Lived Assets to be Disposed Of." (2) Calculated as one-third of rentals. -20-