1 EXHIBIT 21.1 SUBSIDIARIES OF PENNZOIL-QUAKER STATE COMPANY (AS OF DECEMBER 31, 1998) PZL PARENT --- ------ Atlas Processing Company (Delaware)......................... 100% Excel Paralubes (Texas General Partnership)............... 50% Pennzoil Wax Partner Company (Nevada)..................... 100% Bareco Asia Pacific Pte. Ltd. (Singapore).............. 50% Bareco Products (South Carolina General Partnership)... 50% Bareco International Sales Corporation (Virgin Islands)............................................ 100% Penreco (Texas General Partnership)....................... 50% Jiffy Lube International, Inc. (Nevada)..................... 100% American Oil Change Corporation (Delaware)................ 100% Heritage Merchandising Co., Inc., (Virginia).............. 100% Jiffy Lube International of Maryland, Inc. (Maryland)..... 100% Pennzoil Deutschland GmbH Mineralolvertrieb (Germany)....... 100% Pennzoil Products Australia Company (Nevada)................ 100% Pennzoil Products Benelux Company (Nevada).................. 100% Pennzoil Products Company de Mexico (Nevada)................ 100% Pennzoil Products International Company (Mauritius)......... 100% Pennzoil India Limited (India)............................ 96.4% Pennzoil Products International Holding Company (Delaware)................................................ 100% Pennzoil Products Canada Company (Nova Scotia)............ 100% Pennzoil Products Mediterraneo, S.L. (Spain)................ 100% Pennzoil-Quaker State Asia Pacific Company (Nevada)......... 100% Pennzoil Receivables Company (Delaware)..................... 100% PZ Shareowner Services Company (Delaware)................... 100% Quaker State Corporation (Delaware)......................... 100% Lube Acquisition Corporation (Delaware)................... 100% QSHK Corporation (Delaware)............................... 100% Quaker State, Inc. (Canada)............................... 100% Quaker State Investment Corporation (Delaware)............ 100% Blue Coral, Inc. (Delaware)............................ 100% Blue Coral-Slick 50, Inc. (Delaware)................. 100% Petrolon International Limited (Isle of Man)......... 99.9% Petrolon Europe Limited (Isle of Man)............. 99.4% Quaker State France S.A. (France)................. 100% Pennzoil-Quaker State Limited (United Kingdom).... 100% Medo Industries, Inc. (New York)....................... 100% Q Lube, Inc. (Delaware)................................ 100% The Valley Camp Coal Company (Delaware)................ 100% Donaldson Mine Company (West Virginia)............... 100% Kelley's Creek and Northwestern Railroad Company (West Virginia)..................................... 100% Elm Grove Coal Company (West Virginia)............... 100% The Helen Mining Company (Pennsylvania).............. 100% Kanawha and Hocking Coal and Coke Company (West Virginia)........................................... 100% Shrewsbury Coal Company (West Virginia).............. 100% Valley Camp of Utah, Inc. (Utah)..................... 100% Valley Camp, Inc. (Canada)............................. 100% Rain-X Corporation (Arizona).............................. 100% Specialty Oil Company, Inc. (Delaware).................... 100% Specialty Environmental Services of Texas, Inc. (Texas)............................................... 50% Savannah Company Limited (Bermuda).......................... 100% UMW Pennzoil Distributors SDN. BHD. (Malaysia).............. 50%