Is starting a cold engine and driving a very short distance and turning the engine off worse than letting the engine idle to warm up?

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    How short is "very short?" Two or three car lengths, so you are not blocking someone else? 100 yards/meters? Half a mile? or what? – alephzero Dec 28 '18 at 18:20

Are you talking about doing this regularly? If so, neither will do the engine much good! Engines need to be up to operating temperature to work effectively-too many short, or very short trips will do it no good in the long run

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