Oscar CoolCar Long Life Antifreeze Coolant G12 50% is a ready to use automotive radiator fluid composed of demineralized water, ethylene glycol and an advanced blend of balanced corrosion inhibitors based on OAT technology. 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 G12 Coolant. Oscar CoolCar is a full mono ethylene glycol-based coolant for a liquid cooled crankcase system. It contains anti-corrosion and anti-rust additives based on OAT technology. It is harmless to rubber and does not foam or clog radiators. It must be mixed with water to a concentration of 33% and 50%. NEVER used more than 50%.