Antifreeze, 50/50 Pre-Diluted, 1-Gal.Prestone, Gallon, 50 50 Pre Diluted Antifreeze Coolant, Prestone, Gallon, 50 50 Pre Diluted Antifreeze Coolant features an enhanced Cor Guard inhibitor package that prevents corrosion and helps engines run longer. Prestone 50 50 Prediluted Antifreeze Coolant with Cor Guard is compatible with any antifreeze coolant, regardless of color, and can be used in all makes and models of cars and light duty trucks.