Purple IceŒ¬ is a high performance, synthetic, radiator coolant additive for both gasoline and diesel engines. It is formulated to reduce the surface tension of the coolant, which improves heat transfer through the cooling system while providing additional protection against rust, corrosion and erosion. Purple IceŒ¬ prevents the formation of scale deposits in the radiator for optimum coolant flow and lubricates the seals of the water pump. It is ideal for use in straight water racing applications or in antifreeze / water mixtures. Purple IceŒ¬ is compatible with traditional ethylene glycol antifreeze (green) and GM Dex-CoolŒ¬ antifreeze coolants. Reduces Coolant Temperatures Extensive testing confirms Purple Iceä‹¢ reduces coolant temperatures better than comparable products while providing extra corrosion protection. For example, the average operating temperature of a 350 c.i.d. V8 engine (equipped with 160ŒÁ thermostat) when dyno-tested with different coolants are: A. Standard mix of water and glycol (antifreeze) 228ŒÁ F B. 50 / 50 water / glycol mix with Purple Iceä‹¢ added 222ŒÁ F C. Straight water (no corrosion protection) 220ŒÁ F D. Water with Purple Iceä‹¢ added 200ŒÁ F Recommended Treat Rate For use with antifreeze -- 1 oz. / quart of cooling system capacity For straight water applications -- 1.5 oz. / quart of cooling system capacity Note: Minimum of 20 percent antifreeze recommended in street driven vehicles.