What are you guys using in the winter to prevent freezing of the coolant? My unheated barn stays about 10 degrees warmer than outside, but for the most part it is still below 32 degrees in there most of the winter.
I ended up getting some of the Sierra brand pet safe antifreeze. So far except for a greenish hue to the coolant it seems to act the same as just the coolant/water mix. I'll have to wait till it's below zero to see how it reacts or if the oils separate or not.