Can we talk about this in a little moe detail? For example, how do you replace one and where is it? I am using what I believe is a Vans pressure gauge.
I'm a new owner myself (RV-7) and have had some quirky oil pressure readings very similar to the OP. Mine normally cruises at 80 psi but every now and then, it jumps to around 90-92 psi for no apparent reason, AND while I am not looking. Then, later in the flight or the next flight, it will be back to "normal" at 80 psi. It was always virtually in the green so no real worry to me but it is the unexplainable differences that bother me. I began logging my pressure and some other data to see if I could see a pattern. Nothing is apparent.
Before I knew much about the plane, after I just purchased it, it seemed to be 60'ish at 1000 rpm on start-up, around 70'ish on the ground before takeoff but under a little more power, and 80'ish in flight. But I don't remember it ever being different. Now it seems to be more inconsistent, but in the green.
Thanks. Andy