1. Amsoil Inc
2. Basf Se
3. Bharat Petroleum Corporation Limited
4. Bp Plc
5. Blaser Swisslube Ag
6. Carl Bechem Gmbh
7. China National Petroleum Corporation
8. China Petroleum & Chemical Corporation (Sinopec)
9. Chevron Phillips Chemical Company Llc
10. Eni Spa
11. Exxon Mobil Corporation
12. Fuchs
13. Gazprom Neft Pjsc
14. Gulf Oil Corporation Limited
15. Hpcl
16. Idemitsu Kosan Company Ltd
17. Indian Oil Corporation Limited
18. Illinois Tool Works Inc
19. Jx Nippon Oil & Energy Corporation
20. Kluber Lubrication
21. Shell Corp