am guessin here.. yer oil is somehow getting from sump to combustion chamber and at the rate your saying about the only way it can would be throu the turbo.
if you say you have blocked the inlet then that only leaves the outlet and as mr holmes sed " How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth? "
don't fer get that oil is the sump isn't at any kinda level when injun is running. its being splashed about and dribbled down from up top..
