Dex-Cool™ Long Life Concentrated Engine Coolant, 1 Gallon by Zerex®. Concentrate. Volume: 1 Gallon. Color: Orange. Quantity: 1 Jug. Orange. Zerex™ Dex-Cool® Antifreeze/Coolant is automaker approved for use in GM vehicles which require OAT Dex-Cool™. Meets or exceeds the following industry specifications: ASTM D3306, SAE J1034, J814, J1941, TMC of ATA RP-302B, and Federal Specification A-A-870A. Valvoline™ Zerex™ Dex-Cool™ Antifreeze/Coolant is automaker approved for use in GM vehicles which require OAT Dex-Cool™. Orange. Zerex™ Dex-Cool® Antifreeze/Coolant is automaker approved for use in GM vehicles which require OAT Dex-Cool™. Meets or exceeds the following industry specifications: ASTM D3306, SAE J1034, J814, J1941, TMC of ATA RP-302B, and Federal Specification A-A-870A.