Coolant circulates through your engine and radiator to carry away heat and prevent freezing, while additives supplement that base fluid with extra corrosion protection, water pump lubrication, or a boost to heat transfer. Running low-quality, diluted, or worn-out coolant is a common contributor to overheating, radiator and heater core corrosion, and water pump failure over time. Browse antifreeze, pre-mixed coolant, and cooling system additives for cars, trucks, and SUVs to keep your engine running at the right temperature.
