Valvoline Zerex DEX-COOL Antifreeze/Coolant, Concentrated - 1gal (ZXEL1) ZEREX DEX-COOL antifreeze coolant is approved by General Motors to the GM 6277M specification ZEREX DEX-COOL antifreeze coolant contains no phosphates, silicates, borates, nitrates, amines and nitrites Valvoline ZEREX DEX-COOL antifreeze coolant is a patented* carboxylate formulation with a service life of up to five years or 150,000 miles When diluted 50% with water, ZEREX DEX-COOL protects modern engine components from winter freezing and summer boiling For any product use or product technical questions call 1-800-TEAM-VAL