Alot of guys use WD-40, etc to slide couplers on. It's *possible that the oil slip off the metal piping, but I don't think it would look clean. Oil inside of the pipes before the TBs is usually leaking/failing turbos. You might want to look in the ICs to check for oil as well. A guru should be along shortly who has lots of experience with blown turbos as well as oil in those pipes. ...Good luck!
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