Large Arbor Phil I run 15-40 rolleta and 1 quart of lucas
oil suppliment. I run high
oil pressures because of 95% racing. I also run high
oil pressure in my motor. I also have a Shelby block motor at 484 cubes. Alot of other guys run lighter oils. it depends on the clearances in the bottom end. I live at 35-38 psi at idle hot, about 800 rpms and 75-85 psi at 2,500 rpm and up. My clearances on the bottom end are about .002" My setup is hard on the oil pump shaft and the distributor gear. I have other modes to help get the oil to the right places and control camshaft walking. IMO as long as you have a min of 30 psi at idle your moto should be just fine. Most guys are running about 55-60 psi hot. This is fine for a street motor with oil modes done to control oil to the rocker arms. I like a .080" oriface to keep plenty of oil in the heads to cool the valve springs and lube the rockers. I have an Erson setup. I have seen .060" cause blueing of the adjusters on ersons. This was also with a large roller camshaft in the .700" lift range. Less range may be ok with .060", just not my motors.
Bottom note weather the motor is a hydro or solid motor, don't idle it a long time. There is about a 15-20 psi drop in pressure from where the reading is to the farthest part of the motor. this applies to #4 & #8 rods. Perluber like a accusump 2 - 3 quart tank added to the system prevents dry starts. 90% of wear on the bottom end comes from startups and the rotating assembly waiting for the rods and crankshaft to float on the oil film.
I have tested on my fleet of cars and trucks and found that Lucas oil suppliment has a clinging to it and helps pervent dry starts after motors have been sitting of a month or more. You know when you hear the lifters or rockers clicking for the first 5-15 second on startup after not running for a couple of weeks. Side note, if using Lucas need the motor hot and pour in slowly to help it mix with what you have in the motor already.
Everybody has different ideas about the best oil, different weights, ifferent blends. Use what you feel works for you and your motor. If some one tells you that they have a better oil, tell them you will use it as long as if the motor has a problem they will pay for the repair. Last time I checked it was about 17.5K for a shelby motor rebuild.
Your fine Rick l.