Oil pressure normal operating range

When I start up my 98 Jimmy cold the oil pressure gauge reads around 50 psi. When the motor has warmed up, the pressure varies between 30 and 65 psi depending on engine speed. At cruising speed it's at about 55 psi.
What should the normal operating range for the oil pressure be? Is the deviation I'm seeing cause for concern?
I thought it was so I replaced the oil pressure sending unit with no results.
Any thoughts?
Thanks

Can you post where on the gauge these measurements are..

EG. 1/2, 3/4?

I am in Canada and we have a difference system here.

20 psi is 1/4 gauge
40 psi is 1/2 gauge
60 psi is 3/4 gauge
I guess I don't know for sure if the units for these reading are psi either, I just assumed. What are the units in Canada, Pascals?

kPa

Looks like you oil pressure is exactly the same as mine.