- Amsoil Inc.
- BASF SE
- Carl Bechem Lubricants
- Bharat Petroleum Corporation Limited
- Blaser Swisslube
- BP p.l.c.
- Caltex Australia Group
- Chevron USA Inc.
- China National Petroleum Corporation (PetroChina)
- China Petroleum & Chemical Corporation (Sinopec)
- Eni Deutschland GmbH
- Exxon Mobil Corporation
- Fuchs
- Gazprom Neft PJSC
- Gulf Oil Corporation Limited
- HPCL
- Idemitsu Kosan Co. Ltd
- Indian Oil Corporation Ltd
- ROCOL
- JX Nippon Oil & Energy Corporation
- Kluber Lubrication
- LUKOIL
- Motul
- PT Pertamina(Persero)
- Petrobras
- Petrofer Chemie H. R. Fischer GmbH + Co. KG
- PETRONAS Lubricants International
- Phillips 66 Lubricants
- Repsol
- Royal Dutch Shell PLC
- SK lubricants co. Ltd
- Tide Water Oil Co. (Veedol International Limited)
- Total
- Valvoline Inc.