Any reason why I couldn't use propylene glycol instead of EG? It doesn't have as low of a freezing point, but I don't really have to worry about that in this weather!
Is there another reason why I wouldn't want to use it?
Also as a side note, why do we not use oil as a coolant? (I know that the engine oil does help with cooling, but I'm not talking about that). Couldn't one use a really thin, maybe 0w-10, oil in a coolant loop? I would think (and read) oil is a better vehicle for heat pick-up and removal.