ZEREX Dex-Cool Ready to Use coolant is a long life, ethylene glycol based formulation suitable for passenger cars, light duty trucks and 4WD vehicles. The formulation is designed for both petrol and light diesel engines. ZEREX Dex-Cool is suitable where an ethylene glycol OAT coolant formulation is required. Refer to vehicle owner’s manual for correct coolant specifications. Mixing different coolants is not recommended.