1. AMSOIL Inc.
2. BP PLC
3. Chevron Corporation
4. ENEOS Holdings Inc.
5. Exxon Mobil Corporation
6. FUCHS SE
7. Grupa Lotos S.A.
8. Hindustan Petroleum Corporation Limited
9. Idemitsu Kosan Company
Ltd.
10. Indian Oil Corporation
11. Morris Lubricants
12. Motul S.A.
13. Neste Corporation
14. Petronas
15. Phillips 66 Company
16. PJSC Gazprom
17. PJSC Lukoil Oil Company
18. PJSC Rosneft Oil Company
19. PT Pertamina
20. Quaker Chemical Corporation
21. Reliance Fluid Technologies
LLC
22. Royal Purple by Calumet Specialty Products Partners
23. Sasol Limited
24. Saudi Aramco
25. Shell PLC
26. Sinclair Oil Corporation