One thing that bryan from BNRsupercars told me is if you hare getting oil in the exhaust chances are that you are running too much pressure to the turbo. The oil goes through the rear seal, into the turbine side of the turbo and puff out the exhaust. Jims comment reminded me of this.

 

yeah guys, don't forget to use the restrictor pellet upstream of the oil intake on the turbo.