Originally Posted by ar design
Bad turbo or leaky injector gets my vote.
+1 on the bad turbo. Just becasue they don't find any "leaking" doesn't mean the exhaust side of the turbo isn't passing oil. The reason it would smoke is because the turbo would burn the oil off in the hot exhaust, so your evidence literally goes up in smoke. The oil dump usually happens during deceleration with a bad turbo seal. Smokes when you come to a stop, but looks okay while cruising. As it gets worse, you'll also get a big puff on initial acceleration, after the car has idled for a minute, but then the smoke goes away until you stop again.