Oscar CoolCar Universal Antifreeze Coolant G11 33% – 50%, pre-mixed ready for use. Ethylene glycol based. For use in all makes and models of cars, both automotive engines and heavy-duty diesel engines. It’s designed to protect the cooling systems of water-cooled petrol engines. The majority of passenger cars’ and light diesel vehicles’ radiators can use Oscar CoolCar Coolant. Oscar CoolCar is a full mono ethylene glycol based coolant for a liquid cooled crankcase system. It contains anti-corrosion and antirust additives. It is harmless to rubber and does not foam or clog radiators.