ES Compleat OAT Antifreeze/Coolant is a premium concentrate formula engineered for maximum engine protection. This convenient 2-pack of 1-gallon containers features an extended life ethylene glycol base with a specialized nitrite, amine, phosphate, and silicate-free formula. Designed for use in all diesel and gas engines, this coolant offers impressive million-mile life-of-engine protection. The formula is fully compatible with other coolants and comes OEM approved. Each container includes a safety bitterment agent and features a user-friendly design with a secure red cap and ergonomic handle for easy pouring. This professional-grade coolant provides reliable temperature control and corrosion protection for your engine's cooling system, making it an ideal choice for fleet maintenance and heavy-duty applications.