Quote:
Originally Posted by 631twentyeighteye
idling=zero mpg. minimal idling=best mileage. with that being said, i let mine sit in the mornings for 5-10 mins before i leave for school. I dont care what BMW says, letting oil circulate on a cold motor is better then just starting it and taking off.
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I read somewhere, can't remember the source, but it stated that it is better to warm up most modern engines by driving them lightly the first few miles, rather than idling.