Purple Ice® FAQs
As an advanced radiator coolant additive, Purple Ice significantly reduces the surface tension of the coolant in your engine cooling system, enabling it much greater contact with the interior surfaces of the cooling system components. By increasing the contact area in this way, it targets problematic hot spots and increases the heat transfer through the cooling system.
Purple Ice should not be used with other heat-transfer or cooling enhancing products or “water wetters”. If such a product has been used in the cooling system, the system should be drained and flushed before using Purple Ice.
Purple Ice is compatible with supplementary diesel coolant additives and cooling system additives intended to stop or slow leaks. Please note that such stop-leak products often typically put a coating on the interior surfaces of the cooling system, so the effects of Purple Ice may be diminished.
Purple Ice is compatible with all current OEM/factory and major brand automotive antifreeze. This includes traditional green ethylene glycols, as well as OAT/HOAT antifreezes (e.g. DexCool; Ford and Chrysler orange, gold and pink; European and Japanese OEM red and pink, etc.).
Purple Ice may be added to any antifreeze/water mix; however, testing has shown higher water concentrations yield greater cooling benefits. While Purple Ice does contain corrosion inhibitors as well as lubricity to compensate for a lower antifreeze/water concentration, Royal Purple recommends a minimum of 20 percent antifreeze concentration be used in street-driven vehicles. Purple Ice has no effect on the boiling and/or freezing point of water, so an appropriate antifreeze/water mix ratio for the cold temperatures in your area must still be used.
When using Purple Ice with an antifreeze/water mix, Royal Purple recommends adding 1 ounce of Purple Ice per quart of cooling system capacity. For straight water (racing) applications, Royal Purple recommends adding 2 ounces of Purple Ice per quart of cooling system capacity.
When used with antifreeze, Purple Ice should be added once a year or every 30,000 miles, whichever comes first, in order to maintain proper performance. When using Purple Ice in a cooling system running straight water, Purple Ice should be added once a year or every 15,000 miles, whichever comes first.
The recommended dose is 1 to 2 ounces of Purple Ice per quart of coolant capacity, with the higher dose providing more effectiveness. Using up to about 2.5 ounces of Purple Ice per quart of coolant capacity is the maximum effective dose in any cooling system. Dosages greater than that will provide little to no increase in benefit, and may result in foaming in the cooling system. It will cause no damage to cooling system components, though.
Yes. Purple Ice may be used in diesel engines for improved heat transfer as well as reduced cavitation. Purple Ice is also compatible with supplementary diesel coolant additives.