This depletion prevents the corrosion inhibitor package from being able to effectively protect your engine components from corrosion and erosion damage including liner pitting.
Potential Problems with Glycol.

- Poorly maintained systems can result in coolant dilution if the radiator is topped off with plain water.
- Glycol below 25% becomes corrosive particularly so around the 12% level.
- The anti-freeze properties of Glycol can be immediately disregarded in the tropics
- A 50% Glycol coolant mix will only raise the boil point by 8 degrees Celsius above the temperature set by the cap pressure

Why Some Manufacturers Recommend Glycol

Major heavy duty diesel engine manufacturers are northern hemisphere based.
Severe northern hemisphere winters dictate the use of anti-freeze as a matter of course.
Tropical regions are a small portion of the market to them.

Prix Max Long Life Coolants

The industry benchmark for extended service coolants New generation Organic Acid Technology (OAT) supported by extensive field testing over 10 years and 40+ million kilometres The technology is approved by major OEM's such as Daimler-Chrysler, Scania, MAN, Renault, MACK-RVI, Ford, GM, Detroit Diesel, Caterpillar, Komatsu, Cummins, Deutz-MWM, GEC-Alsthom, etc. PrixMax MEG95 long life antifreeze concentrate PrixMax RCP long life inhibitor concentrate Silicate-free non-depleting inhibitor providing extended coolant drain intervals of 6 years or 1,000,000 km or 12,000 hrs (16,000 hrs for stationary engines) No harmful amines, nitrites or phosphates CEPA designated "Readily Biodegradable" and environmentally safe corrosion inhibitors with low toxicity to marine life OAT ain't OAT!! Beware of OAT products which are not OEM proven

Benefits

- fill-for-life" inhibitor concentrate service fluid can be recycled / reused
- meets OEM performance requirements
- low toxicity to marine life and no OH&S issues
- environmentally safe in event of spillage
- treat at 7.5% with good quality water
- silicate free for seal & water pump durability
- lowers operating temperature

Prixmax RCP rates 0 on the poisons schedule

This technology was driven in the late 1980's by the need for an engine coolant to be able to protect modern diesel engines

The requirement for engines to produce more power with less weight, better efficiency and reduced emissions, brought about the introduction of exotic alloys into the metallurgy of modern engines

With these alloys came corrosion and erosion problems associated with dissimilar metals in a liquid environment - namely the cooling system

It was found that conventional chemistry coolants, which had worked fine for cast iron engines, no longer had the capacity to protect these alloys from damage

OEM's were also striving towards longer service intervals and extended warranty periods
It became necessary to re-invent the wheel
Many years of research resulted in the development OAT coolants which have addressed all of the issues required of them with the added benefit of being harmless to the environment