Here is some oil pressure data from a recent test.
The graph below shows the engine RPM, oil pressure and oil temperature when we did some acceleration tests (wide open throttle) in second gear to the top of 3rd gear on a closed course we rented.
What I find interesting is that with the engine oil temp at 103C / 217F at 6,000 RPM there is 104 PSI of oil pressure.
Test results from 2011 G37 Sport Sedan (6MT) with 105,000 miles.