Valvoline™ ZEREX™ Original Green Antifreeze/Coolant has a low-silicate formula that offers superior cooling system protection in heavy-duty applications with use of SCA (supplemental coolant additives). The traditional universal ethylene glycol-based formula has a proprietary corrosion inhibitor package to help prevent rust and corrosion, and a high-quality defoamer. ZEREX Original Green will not harm gaskets, hoses, plastics, or original vehicle finishes. It offers protection up to 150, 000 mi. /3000 hr. /5 yr., and is compatible with major American coolant brands. Antifreeze Coolant, 1 gal., Concentrate