Chrysler told AEI it had been running dynamometer tests of cooling systems for the past year to ensure water pump cavitation erosion corrosion would not be a measurable issue. The use of highly purified water in every OEM coolant fill (50-50 mix with antifreeze) also helps to protect the system until corrosion protection is established. But following the OEM fill, the quality of the water and the compatibility of the antifreeze chosen for top-ups and an eventual flush-and-fill cannot be ensured. A mere 17% mix with an incompatible antifreeze is sufficient to accelerate system corrosion.