Clemsonfor wrote:radioguy41 wrote:50/50 is the sweet spot. 90/10 would beg the question "Why bother?". If AF content goes beyond 50% the coolants ability to cool goes down which can cause overheating. More water = better cooling, more AF = better freezing protection. The optimum balance point is a 50/50 mix.
You get some rust prevention abilities and lubricity. But the sweet spot on those little yanmars is 25/75 with the latter being water
In Carolina maybe, not in PA or north, something would crack or split come Winter.