Engineered for ultimate durability and unmatched versatility, Fleetguard® ES Compleat OAT (CC36074USR) represents the pinnacle of cooling system technology. This "Life-of-the-Engine" coolant is designed to provide exceptional protection for up to 1,000,000 miles, significantly reducing maintenance intervals and long-term operating costs. At the heart of this formula is advanced Organic Additive Technology (OAT). By utilizing a chemistry that is completely free of nitrites, amines, phosphates, and silicates, ES Compleat OAT prevents the scale buildup and drop-out issues often associated with traditional coolants. This clean formulation is fully compatible with silicone seals and gaskets, ensuring the structural integrity of your cooling system over millions of cycles. One of the most significant benefits of this product is its universal application. Whether you are managing a fleet of heavy-duty diesel trucks, light-duty passenger vehicles, natural gas engines, or modern battery electric vehicles (BEVs), this coolant provides a single-solution simplified inventory. Its robust chemical profile is highly resistant to system contaminants, making it the preferred choice for major Original Equipment Manufacturers (OEMs) worldwide. Choosing Fleetguard® ES Compleat OAT means choosing superior heat transfer, excellent cavitation protection, and the peace of mind that comes with a premium, extended-life solution. Keep your engines running cooler and longer with the industry standard in heavy-duty protection.