John Deere TY26573 1 Gallon Engine Coolant, Cool-Gard™ II, Concentrate advanced protection designed specifically for heavy-duty engines. This engine coolant concentrate is expertly formulated with a powerful proprietary blend of anti-corrosion inhibitors, ensuring maximum cooling system protection for both diesel and gasoline engines. The optimized formula promotes efficient heat transfer, which can help reduce maintenance costs and extend the life of your engine. Additionally, it provides excellent defense against zing, boiling, corrosion, cavitation, foaming, rust, and scaling, helping your engine perform reliably even in extreme conditions. Model Number: TY26573