It is "BAD" to let your car idle on a cold start.. 30 seconds should be more than enough.. It is also bad to rev it high when it is cold.. You should wait a few seconds, then set off, driving like a nanny and keeping the revs low until it warms up completely.. Because the oil temperature must reach its optimal level as QUICKLY as possible.. It takes A LOT longer to idle it all the way to warm then to drive it really nice and slow..
Last edited by speedee911; 01-08-2010 at 01:32 AM.
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