Description Passenger Car Light Truck Antifreeze Coolant Advanced and unique poly-organic acid technology (OAT) delivers fast-acting, long-lasting protection for automotive cooling systems. Mixed with high-purity water to prevent scale and deposits and keep your engine running clean. See the Product Data Bulletin for full details. Outstanding Cooling-System Protection Superior heat transfer Excellent protection against corrosion, freezing and boil-over Virtually eliminates scaling problems Maximum protection in extreme temperatures and operating conditions Long-lasting protection for up to 150,000 miles or 5 years, whichever comes first, in passenger cars and light trucks AMSOIL Resists Corrosion In third-party, industry-standard testing, cast-iron and copper plates protected by AMSOIL show virtually no signs of corrosion.HH HHBased on results of the ASTM D2570 corrosion test. See the Product Data Bulletin for full details.