Quote Originally Posted by DennyW
All I'm going to say is, normal oil pressure is 40-65 lbs. You can take it from there.
Every factory recommendation I've seen states (at full op temp and at idle as the questioner here stipulated for his low numbers) somewhere between 5-20 psi depending on factory suggested oil vis and temp. I'd love to see any manufacturer specs you can come up with for passenger car engines that supports 40-65 at idle and full temp.