What is the best way to clean turbo from the inside? I just bought VF39 turbo and for over night I put some oil in to it trough oil return pipe and plugged the oil feed side. Oil return pipe was facing to the sky for night. Today I noticed some oil on the exhaust/wastegate side of it. Does this mean that it is leaking or something? I hope that you get the point. I want be sure that it is working okay before I do the swap.

Should the oil stay in the middle of the turbo if I put some in there?

thanks in advance