No, the engine has never been rebuilt. I will know in a couple of weeks if the oil consumption was the turbo or the engine. I am 90% sure it was the turbo. Started all of a sudden and Garrett said it was definitely leaking oil. The engine has always ran great in this car and gets 25-30 mpg. In my opinion the main problem with the 350 diesel is all the soot that it breathes. You would not believe the gunk that collects in the intake. And just think how much more goes through the engine. In my opinion an engine should intake only clean filtered AIR. I think that is the life of the 350 diesel. My 2 cents worth.