I let the idle settle in the mornings or when I haven't started it in awhile, 30sec-40secs usually. I don't punch it above 2750rpms either until the coolant guage gets warm. With the oiling problems the car has, I want to make sure the oil's nice and warm and slippery before I do any fun stuff.
I don't buy that idling for too long will ruin the car, it's a modern car -- are you telling me all those poor bastards stuck on the interstate in heavy traffic for hours are destroying their cars ?
