before I pulled the engine out of my wrecked 3ood (this was just a few weeks ago) I left it idling and actaully forgot about it. It was idling for three hours
before I knoticed the noise. I guess this means I probably have a crapload of carbon in there, that will be gone soon the way I drive.
As for warming it up, I let mine warm up for usually ten minutes before I go. I like getting in a car thats warm, happy and strong, not cold slow and shifting weird