History 2011 S N18. 109l miles .Had a valve cleaning they were bad but not crazy bad. The car smokes typically after it reaches operating temp, at that point its poofs after sitting in traffic or a long idle, also if I shut down and start her up after a short time I get the smoke. Once its at Op temp and romp it she smokes.
Plugs at clean not fouled, after the valve cleaning I noticed my PCV hose to turbo is dry and clean.

I hear valve seals and guides and piston rings but the plugs are always clean.
She seems to produce good power, especially after the decoking.

Last year I repaired a leak at the cooler and while I was at it I replaced the turbo oil feed and return lines.
Last I checked I didnt feel any major play in the turbo shaft side to side, I didn't check from front to back in line with the shaft though.
Thoughts

 

 

Catch can = useless
After my walnut blasting the hose from valve cover to turbo is spotless. Before yeah it had oil in it.
The problem is either riings v seals or turbo

 

If you suspect rings, do a compression test. How much oil do you have to add over a given set of miles?

 

Have you changed the valve cover, sometimes the PCV valve sticks open and then you get excessive oil, but you said its dry.

 

VC was changed at 85k miles Im at 109k now.
I had the vavles cleaned and the tube from VC to Turbo is clean and dry now.
Looks like the seals are going to get done. now

 

Seals brother seals.