Lucas Antifreeze Coolant Additive Super Coolant 473ml 10640Lucas Super Coolant has been scientifically formulated to provide the ultimate protection in automotive and racing cooling systems. It protects the entire system from rust, corrosion and electrolysis including aluminum. Our unique formula prevents deposits that can cause overheating, and has been proven to reduce coolant temperatures up to 20 Deg F. Lower cylinder head temperatures means advanced ignition and more horsepower.