I was driving home last night and the engine was already warmed up and I was running exactly 80 on the oil pressure gauge. It was 55-65 degrees outside and I was driving 75 MPH. Sometimes when the motor is cold it will go off the scale and read 85-90! It never drops below 70 unless I'm slowing down or stopping. It this pretty good?

 

my car goes from 30 - 90 on a daily basis, but my engine is focked so it doesnt surprise me. 60 was the norm for me but i havent seen that in a long time.

 

Mine is usually at 60 while driving and slightly less while idling after the car is warm. Its higher when i start it cold untill it warms up. We have to remember these arent exactly the most accurate gauges on the earth. I use them only as a reference to detect a problem. Even then no oil pressure probably means a bad gauge or sending unit. If you want a accurate reading change the gaugue out.