This is known issue with the Boxter when you are driving on tracks. It only happens during left turn with maximum throttle and 5000+ revs on the engine. Under very specific circumstances oil is sucked up by the AOP and blown into the intake. This cause immediate misfire and flashing CEL, loss of power aso.
There is no harm though - the engine just needs to idle for a few minutes to burn the oil and then everything is ok again.
My 2004 Boxter S did exactly the same, 3rd stint 2nd round... I guess it has to be "the perfect slush" before the oil is sucked up...
I don't know if the AOP is being damages if it happens "often"... so far it has only happened once for me out of 4 track-days. If you drive with "sticky tires" the risk is higher as the G-force is increased.
/Lars
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