Description Cool Down⢠improves the performance of your coolant and is safe for all radiator systems â ideal for racing, street, RV and tow vehicle applications. It reduces cylinder head temperatures up to 75ÂF! Cool Down increases coolant flow for better heat transfer, lubricates all vital components and is approved by most race sanctioning bodies. One 16oz. bottle treats cooling systems of 12-20 quarts. For straight water applications, an additional 50% more Cool Down is recommended while diesel applications require twice the normal amount. Treatments last for one year or 30,000 miles, whichever comes first.PRODUCT DETAILReduces cylinder head temps 75ÂF and overall coolant temps by up to 30ÂF Improves coolant flow for better heat transfer Lubricates all vital components Protects sensitive aluminum alloys