Addinol
Amalie Oil Co.
Bel-Ray Company Llc.
Bharat Petroleum
British Petroleum (BP) PLC
Chevron Corporation
Croda International PLC.
Dowdupont Inc.
Engen Petroleum
Eni Spa
Exxonmobil Corporation
Fuchs Petolub SE
Idemitsu Kosan Co. Ltd.
Indian Oil Corporation Ltd.
Liqui Moly GmbH
Lubrication Technologies Inc.
Lubrizol Corporation
Lukoil
Morris Lubricants
Motul S.A.
Peak Lubricants Pty Ltd.
Pennzoil Lubricants
Penrite Oil
Petro-Canada Lubricants Inc.
Petroliam Nasional Berhad
Phillips 66
Rock Valley Oil and Chemical Co.
Royal Dutch Shell PLC.
Sasol Limited
Sinopec Limited
The DOW Chemical Company
Total SA
Valvoline Inc.