First track day: Autobahn South, 1:37.94

I went to my first track day with the c5 this weekend. I've been to autobahn south enough times that I'm pretty familiar with the line. My previous best in the F82 M4 was 1:38.21. First day out in the new c5 I ran 1:37.94. Down well over 100hp and losing time with shifts vs a DCT. (9c,8r F, 6c,6r R) 30 psi hot F/R

I started out the weekend in Intermediate to make sure I got a coach and since it was the first time on a new platform. I also haven't driven manual in a decade. Figured I'd take it easy. They promoted me to advanced for the second day.

The car has a ton of grip with 315 square. I can definitely feel the lower power though. A lot of cars I'd previously blow by on the straights now had to lift to let me pass in time. The race seats really help. First time using a hans and it makes you really feel locked in there. However this car is making all its time up in corners. It just leaves all the sedan based cars behind there.

1. Burning some oil in the braking zone. The engine is probably under a ton of vaccum and sucking some oil in. Reportedly it clears right up out of the turn, and doesn't impact a high G turn alone. I need to check the oil catch can. Maybe its full?
2. Brake has inconsistent feel. I bled the brake on track. Some people say it is indicative of two things- A leaky master cylinder or air in the ABS. The ABS I need to see if I can get or borrow a tool that can do ABS bleed. I ordered a new master cylinder. Even if it isn't the issue, it is a 25 year old part and probably worth freshening. Probably worth checking the booster vaccum lines too.
3. Check engine light. I ended my day since I couldn't get scanned at the track. Torque pulled O2 low voltage and a bunch of throttle position errors. O2 maybe I melted a harness? I guess we will find out. The TPS errors I suspect are related to the autoblip. I'll contact their support and see what they say. At least nothing major happened.
4. Some oil is leaking. I lost about 1-1.5L a day. Some of it burning, but I have a minor leak when hot. I'll have to chase it down this weekend. Probably just the new oil cooler needs tightened.
5. Grinding noise LR- Either I'm starting to lose a wheel bearing or maybe the axle nut needs torqued. I know SKF trackers are in my future.
6. The tunnel is freaking hot– I think I'll order a c6 tunnel plate and insulation kit and see if that keeps some heat out of the cabin.

Speaking of the new cooler, coolant temps stayed 230-240ish. The oil however was 285 and pretty much never moved. That's kind warm for an oil cooler, isn't it? I was expecting more mid 200's peak.