What Classifies As Low Oil Pressure? 2010 370z

kiwi370z

2010 370z. 83,500 miles / 134,500 kms automatic.

Purchased from a second hand car dealer, in very good condition.

I have had the car for 7 days, and installed a 150 PSI oil pressure gauge today. During this 7 days I've not had the stock oil pressure warning light come on at all.

I've tested the oil pressure with the car on the ground at idle and at 2,000rpm with results as follows:

Oil temperature 80*c (based on stock gauge on dashboard) + Idle RPM in "Park" = 7-8 PSI oil pressure
Oil temperature 80*c (based on stock gauge on dashboard) + 2,000 RPM in "Park" = 36 PSI oil pressure


I don't know what oil is in there currently, but it is new, as the dealer had it serviced prior to me purchasing it and visibly checking the oil it is clear/new looking.

Questions:
How much does a different weight of oil affect oil pressure PSI results?

Are these results of concern?