Prestone® Concentrate and 50/50 Antifreeze/Coolant help a vehicle’s engine last longer with improved extended life technology. Fortified with Cor-Guard™ inhibitors, Prestone’s patented formula prevents corrosion, helping a vehicle’s cooling system run more efficiently and last longer. Prestone with Cor-Guard™ inhibitors is compatible with ANY antifreeze/coolant, regardless of color, and can be used in ALL makes and models of cars or light duty trucks. Prestone Concentrate provides protection up to 5 years or 150,000 miles when flushed and filled