My o-320 as started showing high oil PSI(90-100) at anything over about 2000rpm.
I checked it with a mechanical gauge just to make sure, same readings. Filter and oil change about 6 hours ago, used same oil 100W. Any ideas ?
Skip RV-4
o-320 b3b
I have the same issue with my O-320. Pressure goes above 90 psi after a few minutes of flight even with engine back to 2200 RPM. And that is also after a recent oil change.
If I land and shut the engine off for a few minutes, then restart, oil pressure seems to go back to normal for the next flight segment.
Not sure what is causing this. Anyone any ideas?