Does it look anything like this? In my case, the issue tuned out to be positive crankcase pressure due to a failed PCV. But, I don't remember any odors, other than oil.Okay, riddle me this. I have an S550 Eco which picked up a smoking habbit after I installed a CVF Downpipe and the Base Map from PD Tuning. (Both went in the same day) It's white / gray, bitter, or metallic in sent, and isn't always thick. At first it was only present when I slowed to a stop. Then it began to appear at idle. I first drained the oil. It came out looking almost brand new. I checked the coolant next. Nothing out of the ordinary there either. The level has been constant, and when I pressurize the system it holds pressure. I checked the plugs. They have the typical amount of fouling for less than 1000 miles, and are NOT TOO clean, like they would be if I were burning coolant and the steam were "cleaning" them. I then put a bore cam down each cylinder. I did not find any liquid, or anything out of the ordinary, even with the coolant system pressurized.
I am looking for suggestions to further trouble shooting. My mileage is great. I haven't lost any power. As a matter of fact I chirp tires with WOT up to 3rd gear, can hit 115 - 120 in 3rd and hit 150 mph before I had to get off my exit, on my way to work this morning. Of course I had a cloud of smoke when I stopped to back into my parking space.
What would you check next?
