Need new antifreeze/coolant? Try Cor-Guard! Prestone antifreeze/coolant with Cor-Guard corrosion inhibitors has five times the protection strength against corrosion as the competition, thus delivering longer engine life. Prestone‘s Cor-Guard formula reduces the risk of breakdowns and prevents engine damage from worn-out antifreeze. Corrosion is the enemy of any cooling system; it strips engines of performance and causes premature failure. Cor-Guard tackles it by preventing corrosion from forming on water pumps and radiators better than its competition. It improves existing technology while maintaining the flexibility to work in any light-duty truck. Cor-Guard is available in two products: Prestone Concentrate Antifreeze/Coolant for flushes and Prestone 50/50 Prediluted Antifreeze/Coolant for fluid top-offs. The Prediluted antifreeze/coolant can be added to any existing fluid to optimize the cooling system. For more information, call 888-269-0750 or visit www.prestone.com.