EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Forms S-8 (File Nos. 333-69833 and 333-84266) of Pennzoil-Quaker State Company of our report dated June 28, 2002 relating to the financial statements of Pennzoil-Quaker State Company Savings and Investment Plan which appears in this Form 11-K. /s/ PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP Houston, Texas June 28, 2002