Originally Posted by
AlbertFattal
I'm curious, what's the worst that can happen if I top off my coolant with three cups of distilled/purified water to avoid having to potentially mix incompatible G05 coolant?
My Zerex G05 is Clear BTW.. not sure why.
Nothing. In fact running 100% distilled water is the best thing to do to keep your car at its coolest. Unfortunately, that's only viable for race cars that are garage kept and don't see daily driving duty. You'd need to live in a warm state that never gets below freezing as well.