1. Houghton International Inc.
2. Blaser Swisslube Ag
3. Bp Plc
4. Exxonmobil Corporation
5. Total S.A.
6. Fuchs
7. Quaker Chemical Corporation
8. Eni Spa
9. Chevron Corporation
10. Croda International Plc.
11. Veedol International Ltd.
12. Hindustan Petroleum Corporation Ltd.
13. Master Fluid Solutions
14. Hardcastle Petrofer
15. Zeller + Gmelin Gmbh Co. Kg