gray smoke

Does the smoke clear up after a minute or so? If it does than it most likely is a valve guide seal or 2 or 3 leaking oil down the valve when the car is shut down. this is not a problem just an annoyance. My mothers 02 Camry has done that for the last 30k miles with no ill effects of oil consumption problem. At the most it burns maybe 1 teaspoon oil at each cold start.