- American
Petroleum Institute
-
Anheuser-Busch Companies
- Atlanta
Gas Light
- BMW
North America
- California
Air Resources Board
- California
Department of Transportation (CalTrans)
- California
Energy Commission
- Chevron
- Coordinating
Research Council
- Dinan
Performance Engineering
- Electric
Power Research Institute
- Ford
Motor Company
- Gas
Research Institute
- General
Motors
- Honda
of North America
- Hyundai
Motors
- IMPCO
Technologies
- Mazda
(North America
- Mercedes-Benz
U.S. International
- Mitsubishi
Motors America
- New
York Gas Group
- Nissan
Research and Development
- Pacific
Gas & Electric Company
- Porsche
Cars North America
- Southern
California Gas
- U.S.
Environmental Protection Agency
- Volvo
North America
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