whether its nice and sunny or freezing my balls off cold, i usually start the car and wait about a minute before moving the car. when i start the car, i use the cd player as my 1 minute timer and after 1 minute has passed, i'll then start driving whereever it is i'm going. this isn't extended idling, but i figure its enough time for the engine to warm up a tad and get the juices flowing...good? bad?