Quote:
Originally posted by THAWA
Driving a cold block like a bandit is a good way to blow some head gaskets or warp some heads.
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So will letting an engine idle for 25 minutes in -20 degree temps just so it'll warm up. I think you missed my point. They are both not the wisest thing to do to an engine but chances are you're only taking a few thousand miles of the life of a modern engine by doing both. Ideally you should get a block heater and warm it that way but it is an imperfect world and in the long run that may cost more in initial costs and electricity than the few thousand miles were worth to ya.