EXHIBIT 12 PENNZOIL-QUAKER STATE COMPANY COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES For the six months ended June 30, ---------------------------------- 1999 1998 ------------- ------------- (Dollar amounts expressed in thousands) Income (loss) from continuing operations before income from equity investees $ (10,218) $ (7,423) Distribution of income from equity investees 10,168 14,069 Amortization of capitalized interest 982 884 Income tax provision 10,509 6,829 Interest charges 54,218 44,406 ------------- ------------- Income before income tax provision and interest charges $ 65,659 $ 58,765 ============= ============= Fixed charges $ 54,218 $ 44,661 ============= ============= Amount by which fixed charges exceeds earnings ============= ============= Ratio of earnings to fixed charges 1.21 1.32 ============= ============= DETAIL OF INTEREST AND FIXED CHARGES For the six months ended June 30, ---------------------------------- 1999 1998 ------------- ------------- (Expressed in thousands) Interest charges per Consolidated Statement of Income which includes amortization of debt discount, expense and premium $ 38,822 $ 34,412 Add: portion of rental expense representative of interest factor <F1> 15,396 10,249 ------------- ------------- Total fixed charges $ 54,218 $ 44,661 Less: interest capitalized per Consolidated Statement of Income - 255 ------------- ------------- Total interest charges $ 54,218 $ 44,406 ============= ============= <FN> <F1> Interest factor based on management's estimates and approximates one-third of rental expense. </FN>