Oil pressure issues at Road Atlanta - real or imagined

[Gelbster]

"synthetic 5W40 street oil (not a "race" oil)"
As I mentioned above - Foaming is the remaining suspect ?
Just check your oil specs for detergent & anti-foaming ? That may be the issue. Lots if you Search "Foaming". Easy to test.
From Pennzoil:
"Anti-Foam Additives
Foam-causing air bubbles create a variety of problems in oil. They make oil harder to pump to vital engine parts, reduce the oil’s lubrication effectiveness, and inhibit the oil’s ability to help keep the engine cool. A foamed-up oil can result in serious engine damage. An anti-foam additive helps prevent these problems, specifically at high temperatures"

I'll say no more for fear this turns into an oil debate. Miller - huum wasn't their slogan - "Less Foam more pressure"?
Seriously, Raby and others have explained the problem and solution -just Search -with a cool one.