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I heard many times from friends that after starting up the engine of a car you have to wait a few minutes for it to warm up before driving off. I also heard that this only applies to engines that include a turbo intercooler of some sort. Is there any scientific data that backs this? What are the actual problems (if any) of not doing this?

marked as duplicate by Oddthinking Jan 14 '15 at 13:46

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