Its a 2006 jetta tdi. Its got 330k miles and still runs perfect. Still gets 44 mpg hwy. Burns very little oil. I bought it at at 150k miles. Dont know history before I bought it and I have never cleaned it. I watched a video about cleaning it....car with much less miles. It was clogged to half diameter with carbon gunk. If mine is all clogged with deposits, could this break off and destroy the turbo? Who knows.....maybe engine will last to 400k?