How full was your oil before the track day? I had *exactly* those same things my first track day, which was right after an oil change in which I filled it 1-2 bars over the top. To resolve I dropped the oil filter and them reinstalled a new filter/o-ring. Now when I do an oil change I only fill to halfway between the bars instead of to the top and it has never reoccurred for me, and I have done maybe 12-13 track days since then.
Steve
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