EXHIBIT 12 PENNZOIL COMPANY AND SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES For the three months ended March 31, ---------------------------------- 1995 1994 ------------- ------------- (Dollar amounts expressed in thousands) Income before cumulative effect of change in accounting principle $ 2,743 $ 10,738 Income tax provision (benefit) Federal and foreign (1,325) 4,422 State 740 1,506 ------------- ------------- Total income tax provision (benefit) (585) 5,928 Interest charges 54,494 47,318 ------------- ------------- Income before income tax provision (benefit) and interest charges $ 56,652 $ 63,984 ============= ============= Fixed charges $ 55,557 $ 49,493 ============= ============= Ratio of earnings to fixed charges 1.02 1.29 ============= ============= DETAIL OF INTEREST AND FIXED CHARGES For the three months ended March 31, ---------------------------------- 1995 1994 ------------- ------------- (Expressed in thousands) Interest charges per Consolidated Statement of Income which includes amortization of debt discount, expense and premium $ 49,542 $ 43,764 Add: portion of rental expense representative of interest factor <F1> 6,015 5,729 ------------- ------------- Total fixed charges $ 55,557 $ 49,493 Less: interest capitalized per Consolidated Statement of Income 1,063 2,175 ------------- ------------- Total interest charges $ 54,494 $ 47,318 ============= ============= <FN> <F1> Interest factor based on management's estimates and approximates one-third of rental expense. </FN>