I use 15w-50, mobil 1. I get it for free, so I'm kind of sold on that brand.
Pressure runs between 40 pounds at idle to 75 to 80 on a rev. Whent the
oil gets good and hot, the idle pressure drops to 30 to 35 PSI and the high drops to 65 to 75.
I pump 8 quarts from a 5 baffle pan with SS "bypass" plumbing and .125 restrictors. Tried .040, 060 and .1, but the "feeling" wasn't right at the crank after a run.
10.5 to 1, punched .030 with 63CC heads.
My
oil is Mobil 1 synth, 15w - 50.
Just my $0.02
