[Kido1986]

I went to Sebring this weekend and after 3 20 minute sessions (45-60 minute cool downs between), I gridded for session 4. I was on the grid with the AC on (yeah... I know) four ~10 minutes. When I went to roll out on track noticed the CEL on, the car wouldn't rev hardly at all, 1200rpm or so. Restarted car after a few minutes, would go in limp mode, 4500rpm. Water temps were fine. My bluetooth ODB reader was wigging out and wouldn't connect either (not a car problem, it wouldnt read a 10 year old Tahoe either that day).

My theory is an oil temp problem. After a ~30 minute cooldown, I was able to drive home and the CEL cleared itself after driving for 20 minutes then cycling the ignition.

Haven't read this whole thread but my Googling has come up empty. No one else has had any limp mode issues, other than people tuning the ECU (obviously, self-induced)

Thinking I'm going to need to switch to a 5w-30 as 100F ambient isn't uncommon here. Now to figure out which oil.