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I would not run car few minutes before hitting road. I don't do that when skiing all day here in the Rockies and I start it at -30 sometimes. Reason is that your head keeps certain amount of oil and even if it doesn't, after few seconds you already have proper lubrication.
By idling your mixture is rich for prolonged period of time, washing cylinder walls, mixing more fuel with oil than necessary.
Turn the car, put seatbelt, adjust seat warmers, find your song, hit the road. You will reach operating temperature faster, eliminate faster any fuel from oil and prevent more fuel mixing with oil.
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