Fleetguard® ES Compleat NOAT is a Nitrited-Organic Additive Technology/Extended Life Coolant combining the best of nitrite/molybdate liner pitting protection and extended life benefits. This product is a life-of-the-engine, 1,000,000-mile antifreeze/coolant with use of extender at 600,000 miles. For use in Heavy Duty ELC, NOAT and EC1 systems. The Heavy Duty formula is 2-ethylhexanoic free and compatible with silicone gaskets and hoses.