Peak, Gallon, 50/50 Antifreeze & Coolant, Ready To Use, Convenience & Protection All In 1, A 50% Mixture Of Antifreeze & Water, Provides Maximum Protection Against Scale, Rust, Corrosion, Freeze Up & Boil Over, Pre-Mixed With Deionized Water, Requires No Additional Mixing, Protects To -34&degree. Fahrenheit, Prevents Sludge Clogging, Protects All Cooling System Metals, Including Aluminum, Meets Or Exceeds All Industry Specifications Including Gm 1899m, Gm 1825m, Ford Ese-m97b44-a.