[DJtoad]

That's not a dumb question. Not only will you be able to drain more oil out of your car if it's warm (less clings to internal surfaces), it will help remove anything that may have settled in the bottom of the pan. But in truth, it doesn't make a big difference as long as you're willing to wait a lot longer for the oil to completely drain. Cold oil will trickle out for a long time - up to 15 to 20 minutes -- and if you put the plug back in too soon, you can leave up to a half a quart of old oil in the pan.

But if this is your first time changing the oil yourself, I'd do it when the oil is cold or lukewarm so that you don't have to deal with hot, gushing oil if you misjudge things.