Green Concentrates Automotive Engine Coolant has a proven formula that provides superior cooling system protection for passenger, light-duty and heavy duty vehicles. The Automotive Engine Coolant can be diluted before use to make it more economical. The Automotive Engine Coolant provides corrosion protection in vehicles that specify traditional green coolant. The Green Concentrates Automotive Engine Coolant is compatible with any anti-freeze/ coolant used in any vehicle with aluminium and other engine metals.