I have a 2007 A4 2.0 Turbo. I have an ongoing (2+ years) issue that my mechanic and the dealer have not solved.
Every once in a while (2-3 weeks, sometimes more frequent), upon acceleration (onto a freeway, up a hill, etc.), a large plume of white/blue smoke comes out the back, oil burning. This is a large James Bond type plume. I literally am worried about people not being able to see large. This occurs then next three or four accelerations, smaller plumes of smoke each time, and then the car runs and burns cleanly for the next several weeks.
I have had the turbo replaced.
I have had a series of purge valves replaced.
I have had the system flushed.
Each of these has delayed the onset of the next event for extra weeks.
I suspect I have some sort of an oil leak that is being recirculated into the engine as part of the turbo system.
Any advice would be appreciated. I am taking the car back in and want to be able to describe what needs to be done.


Thanks in advance