The oil pressure when hot in my 0-360 engined RV6 is normally 75 to 80 lbs at normal cruise RPM of 2300 to 2400.
What I have fould is that switching from W80 and W100 to Shell 15/50 multigrade has reduced my oil consumption from 1qt every 7-8 hours to 12 -14 hours.
Of course we are all assuming that the gauges are accurate ?
Regards
JOHN