[Zero10]

Sounds like either an AOS problem, or a turbo problem.
If it still builds boost properly, and doesn't consume excessive amounts of oil, then don't worry too much.
Check your turbo for shaft play.

The oil ontop of your turbo is from the intake track. When it is under pressure, the vacuum line on the bottom of the throttle body leaks, along with the seals for the throttle butterfly. This allows a small amount of oil out, and down onto where you are finding it.