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Havoline Xtended Life Antifreeze/Coolant is based on a patented aliphatic organic additive formulation that provides a service life of 250,000 kilometers/5 years and is approved under GM 6277 meeting the GM DEX-COOL® requirements.This engine coolant can be used in Internal Combustion Engines, Hybrid and Battery Electric Vehicles. During extensive fleet testing, the synergistic combination of mono- and di-carboxylates present in this coolant, have proven to provide protection for in excess of 650,000 km (approx. 8,000 hours) in HGV and bus applications, 250,000 km (approx. 2,000 hours) for cars or 32,000 hours (or 6 years) for stationary engines. Antifreeze is the hidden hero of our car’s engines. If you don’t know how antifreeze works, it’s pretty simple. Antifreeze is added to the water in your engine’s cooling system that lowers its freezing point (and raises its boiling point too). It’s why the liquid in your radiator doesn’t freeze when everything else seems to be! You can choose a concentrated coolant that needs to be mixed with water or a ready-mixed one that can be used immediately. About our Antifreeze and Engine Coolant