Prime® Extended Life AMAM Concentrate is compatible with ANY antifreeze/coolant in ANY vehicle with aluminum or other cooling system metals. The formulas have a blend of long-lasting inhibitors to guard against temperature extremes and the effects of rust, corrosion, and premature water pump failure. Prime Concentrate meets or exceeds ASTM D3306 and D4985 for corrosion protection for cars and light duty trucks, while providing reliable freeze-up and boil-over protection.