optimal warm up time

[aaronng]

I actually had the same question regarding my car and the dealer actually told me to warm up the car for bout 2 mins and cycle through the gears up and down a couple times to get the fluids moving on cold starts, it is supposed to help out with the cold morning notchiness

If your car is an auto, you don't need to do that. "D" lets it go through all gears with no restriction.