ACE Construction, Allison Transmission, Asia Motor Works, BMW, Cummins, DAIMLER, Department of The Army, Detroit Diesel, DEUTZ, ELGI, Ford, GE Transportation System, General Motors, Greaves, Jenbacher, Kirloskar, KRUPP MaK, MACK, MAN, MAN B&W, MTU, National Marine Manufacturers Association, Performance Review Institute, PORSCHE, PSA Peugeot Citroen, Renault, SCANIA, Swaraj Mazda, TATA Motors, test, Vapor, Voith Turbo, VOLKSWAGEN, Volvo, ZF