Oil Overfill

[Parrot356]

A couple of weeks ago I changed the oil/filter in my 2001S in prep for a track day. Change went fine. Filled with 8-8.5 qts of Motul while on the ramps. Started the car drove it off the ramps and checked the oil again. It was a little bit low on the dip stick (as to be expected with an initial fill of 8 qts) so I topped things off with another .5-1.0 qts. Checked the oil and I was at the top of the full mark. Perfect. ready to go to the track. Well first lap coming out of a hard left hander I left a big white smoke screen. Car ran fine but pulled off track obviously. I get back into the pits and check the oil. It is up above the full line (same after checking a few times after letting things sit for about 10 mins).

While in the paddock I borrowed a drain pan and drained about 1 qt of oil off. When I checked the oil level I was just below the full line and I figured all was good. I went out for the next session and the same thing happened in the same place. Big smoke cloud. I assume I still had too much oil in one of the heads that wasn't able to drain off and was too much for the scavenger pump to transfer back.

I did the typical AOS check of running the engine and removing the oil fill cap. There was some vacuum but the cap came off easily. I also scanned for codes and got a misfire on cylinder #2 and an O2 sensor warning. I assumed oil fouling. I drove the car home (on advice for a dealer service manager) and the codes cleared. Car is running fine now. Oil level is 2 ticks below full, no smoke on normal driving, and no oil leaks.

So what I am assuming happened is I filled the oil while on the ramps and then didn't wait long enough for the oil to drain down after I started the car to get it off the ramps before checking again and topping off. Thus I over filled things.

I am hoping that by driving home I burned off residual oil and by letting things set for days that the oil that was probably overwhelming the scavenger pump has drained back to the sump. I am planning on changing out my AOS this weekend preventively, but is there anything else I should be looking into?