UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarter Ended March 31, 2000 Commission File No. 1-14501 PENNZOIL-QUAKER STATE COMPANY (Exact name of registrant as specified in its charter) Delaware 76-0200625 (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification No.) Pennzoil Place, P.O. Box 2967 Houston, Texas 77252-2967 (Address of principal executive offices) EXHIBIT PENNZOIL-QUAKER STATE COMPANY AND SUBSIDIARIES INDEX TO EXHIBITS Exhibit No. - ----------- 3 By-laws of Pennzoil-Quaker State Company, as amended through June 1, 2000. 12 Computation of Ratio of Earnings to Fixed Charges for the three months ended March 31, 2000 and 1999. 27 Financial Data Schedule.