Features:

• Greater wear protection
• Lubricates water pump seals
• Protects aluminum cooling systems
• Provides corrosion resistance, passes ASTM corrosion tests
• For both gasoline and diesel engines

Editor Reviews:

Product Description:
Purple Ice 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 Ice 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 Ice is compatible with traditional ethylene glycol antifreeze (green) and GM Dex-Cool antifreeze coolants. Purple Ice should not be used in new radiators until anti-freeze has been cycled through the system. Contact Royal Purples technical department for more information. Call: 888-382-6300 or E-mail: autotech@royalpurple.com.

Rating : - 10 deg cooler on avg.
I have a Cadillac CTS-V and this helped lower the temp an avg of 10deg in hot and cold.