Huge Smoke Screen From My Boxster At a Track Day

[cornontherob]

Check the engine codes. See what they're coming up with. Once you do that you may have a better idea with what you're dealing with. Since you're suspecting the AOS, try disconnecting the intake tube from the throttle body and getting a look inside the intake manifold. If you see copious amounts of oil in there, then check the tubing from the AOS to the intake manifold. If that's full of oil, then you have yourself an AOS replacement incoming.