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Wouldn't a super-insulated engine block be nice?
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Originally Posted by MetroMPG
Sure - if it (the insulation) went away once the engine heated up, and came back when you switched things off again. I suppose that's why the Prius designers decided it would be easier to shuttle around the warm coolant.
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Darin, any reason why the cooling system, and that would include an external oil cooler, shouldn't be able keep a super-insulated block at optimal operating temperatures even in the summer?