Oil coming out of blow off valve

[CB72]

My Love Fab turbocharged NSX is spraying some oil out of the BOV.
It only happens when the car is driven hard on track.
What could be the cause for this?
Is it the sign of a future big failure?

 

[Stephen@NCAutoUSA]

Hmm keep us updated. Sounds like maybe oil is being sucked up to the throttle body from the turbo. Out of curiosity does the track you drive on have steep inclines or inclined for sustained periods of time?

 

[CB72]

Hmm keep us updated. Sounds like maybe oil is being sucked up to the throttle body from the turbo. Out of curiosity does the track you drive on have steep inclines or inclined for sustained periods of time?

No, the last track meeting I attented was at Magny-Cours which is pretty flat.
I forgot to mention that I pulled a vacuum line from the catch can to the air intake right after the air filter?
It could be that the hot oily gasses from the engine get pulled right through the turbo and out the BOV at lift off?