1. AMSOIL Inc.
2. Apar Industries Ltd.
3. Argos International
4. Calumet Specialty Products Partners LP
5. Chevron Corporation
6. Eastern Petroleum Pvt Ltd.
7. Ergon Inc.
8. Exxon Mobil Corporation
9. H&R GROUP
10. HollyFrontier Corporation
11. Indo Petro Chemical
12. LNG Publishing Co. Inc.
13. Lubline
14. Lubricon Industries
15. Novitas Chem Solutions
LLC
16. Nynas AB
17. Petro?Canada Lubricants LLC
18. Petr?leo Brasileiro S.A.
19. Rahaoil Inc.
20. Repsol
S.A.
21. Resolute Oil LLC
22. Saudi Arabian Oil Company
23. Shell PLC
24. Synforce Lubricants
25. Tulstar Products Inc.