1. Advanced Lubrication Specialties
2. Apar Industries Limited
3. Archer Lubricants
4. Cargill
Incorporated
5. Castrol Ltd.
6. Chevron Corporation
7. Exxon Mobil Corporation
8. Growmark Inc.
9. Mystik Lubricants
10. Phillips 66 Company
11. Royal Dutch Shell PLC
12. Royal Mfg. Co.
13. Sasol Limited
14. Sinclair AG by HollyFrontier Corp.
15. Sinopec Group
16. Texas Refinery
17. Valvoline