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Originally Posted by martyh
The worst thing you can do, especially for diesel engines is run straight from cold
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Yup, you should leave it to idle for a good minute when it's very cold to allow the oil to circulate. Never rev a cold diesel hard as it wears them very very easily.
I have to be very careful myself this winter as I will be doing shorter than normal journeys, as my friend lives just a mile away who I visit most days.
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Also, if a car is idling for less than two or three minutes, it's actually more efficient to keep the engine on rather than switching it off and restarting it again.
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I'd love to know how they worked that one out...