Royal Purple Purple Ice
Royal Purple Purple Ice

Purple Ice is a high performance, synthetic, radiator coolant additive. It reduces engine heat by reducing the surface tension of the radiator fluids for improved heat transfer.

Purple Ice fosters optimum coolant flow by helping to prevent formation of scale deposits in the radiator. It also lubricates the water pump seals.

Extensive testing confirms Purple Ice reduces coolant temperatures better than similar products. For example, the average operating temperature of a 350 c.i.d. V8 engine (equipped with 160° thermostat) when dyno-tested with different coolants are:

A. Standard mix of water and glycol (antifreeze) 228°F
B. 50 / 50 water / glycol mix with Purple Ice added 222°F
C. Straight water (no corrosion protection) 220°F
D. Water with Purple Ice added 200°F


# RYP 01600



Purple Ice FAQs:

Are there any precautions necessary if I've been using another brand of coolant additive?

We recommend flushing the cooling system prior to initial use of Purple Ice.

Can Purple Ice be used with Dex-Cool® antifreeze?

Yes. Purple Ice is recommended for any water / glycol pressurized cooling system, including those using the traditional green silicate based glycols or the newer OAT or HOAT based glycols.

What water / antifreeze concentration is recommended when using Purple Ice?

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 lubricants to compensate for a lower antifreeze / water concentration, Royal Purple recommends a minimum of 20 percent antifreeze concentration be used in street driven vehicles because Purple Ice has no effect on the boiling and / or freezing point of water.

How much Purple Ice do I need to add to my cooling system?

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.

How often should I add Purple Ice to my radiator?

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.

Will adding too much Purple Ice harm my cooling system?

No. A higher concentration of Purple Ice than recommended won’t offer any additional cooling benefit nor will it have any adverse effects on the engine or cooling system.

Can Purple Ice be used in diesel engines?

Yes. Purple Ice may be used in diesel engines for improved heat transfer as well as reduced cavitation.

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