Havoline Xtended Life Antifreeze/Coolant is based on a patented aliphatic organicadditive formulation that provides a service life of 250,000 kilometers/5 years and is approved under GM 6277 meeting the GM DEX-COOL® requirements.*
The main corrosion inhibitors in Havoline Xtended Life Antifreeze/Coolant have been shown to remain above 95% of their original concentration with proper top off after 250,000 kilometers in automobiles. This allows much longer intervals between coolant change-outs.
*DEX-COOL is a registered trademark of General Motors Corporation.