Zerex from Valvoline is the #1 selling OEM-approved coolant brand. Zerex American Vehicle Antifreeze/Coolant is proven to maximize engine life in American vehicles such as Ford, Chrysler and General Motors that specify an orange extended life formula with Organic Acid Technology (OAT). Specially formulated without silicates and phosphates, Zerex is made for your car and protects better than industry standards against corrosion, leaking, deposits as well as freezing and boiling – the four main causes of cooling system failure, which is the leading cause of engine breakdown. Our state-of-the-art OAT formula is silicate and phosphate-free. It protects from corrosion, scale and rust, so radiators, water pumps and other metal cooling system parts (including aluminum) stay clean and your antifreeze flows and functions properly. Zerex American Vehicle Antifreeze/Coolant does not contain amines, borates, nitrates or nitrites. So whether you're topping off your radiator or doing a complete system flush, trust Zerex American Vehicle Antifreeze/Coolant. Made for your car. Made by Valvoline.