in regards to the oil in the turbo pipe, I was talking to someone the other day and they were saying if it gets that stage then what you can do is run wd40 through it. and rev the engine. so get a mate to spray wd40 while you're reving the engine and apparently that cleans the pipe and the turbo.
A whole heap of black smoke is supposed to come out, (all the dirt) but just keep giving it wd40 until it all cleans out.