well my valvecover was leaking oil from the exhaust side. me and justin(installer88) ended up changing both and things was fine and no smoke. the next day i drove my car and i smelled oil burning. i looked behind me and noticed a big cloud of smoke coming from my exhaust.(that was the only time i saw smoking coming from exhaust) i pulled over and popped the hood. it was smoke coming from the exhaust mani or in that area. i thought it was just oil burning off from when i changed the valvecover. i checked all the bolts and made sure they was all tight. a few of them wasnt tight so i tighten them and cleaned all the oil up. what could be the cause of it smoking. its coming from the exhaust side. also the car is running really sluggish. im not driving it now and its parked. i checked the turbo and intake coming from the turbo and its no oil or anything coming from there. what do you guys think it could be? ive searched and cant come up with anything. i kinda of narrowed it down to maybe the rings are taking a crap on me. the car has 69k miles and have been boosted for about 6k of them.