Reference: Antifreeze Problem.

[rob love]

Anti-freeze is not an option in this part of Canada. We are already hitting below zero at night.

Antifreeze will become corrosive if left too long. In the military we were supposed to change it every 4 years if I recall correctly. It might have even been every two years, I would have to check the lubrication charts.

International used to (and I imagine they still do) have PH kits to adjust the PH levels of the coolant in order to maintain it at a neutral level and prevent corrosion.