My oil pressure was low, about 10 psi hot at idle, with full groove mains. Quite unnerving, but always came up with the rpm's. That was with the HV pump. Good luck.
Thats a massive diff between the 25-30psi @hot idle 'just off the freeway' , with 45'ish psi @ idle maintained if the previous cruising was kept below 50mph/2500rpm no matter how long the drive.
bearing/oil temps.
10 psi is fine, but sucks all at the same time.
I would normally go on about higher psi derived from compression=the oil pump..actually heats the oil, but this is just a clearance/less back pressure 'so to speak' ...but the point is, I wonder/ponder the effects of heat displacement with the main bearings?
will it take longer for the oil-bearing-journal to cool and regain psi it would have under general/low stress/rpm driving?