Low oil pressure

PSI is a direct relation to back pressure within the system. If the pressure is low the clearances are probably a bit more opened up than new. Not saying it's bad. As engines get more use they wear in the bearings and such. No biggie. Run the oil for your climate is one of the most important things you can do! To heavy an oil in cold weather and the pump has to fight to pick it up causing starvation. The whole thicker is better and more psi is hogwash. I ran straight 40 wt in my 340. Mind you it was an 11:1 solid cammed monster. But that was San Diego weather where temps averaged in the 60 winter and 95 to 110 in the summer months. Mine had anywhere from 8 psi at idle to 65 at 7000 rpm. Never lost a bearing. (broke the block but that's another story lol) If your that worried about the pressure pull the pan and check the clearances. If they are within spec and your not going to hammer on the engine constantly screw back together and run it. If your sustaining 5000 rpm and up constantly then yes fix your pressures. (any number of things contribute to this)

Some one mentioned newer engines don't last? 174,000 miles on my 2004 GTO and I've not been easy on it begs to differ!!!!! (all aluminum push rod v8!) I run Lucas synthetic racing oil in it in the correct viscosity. I tried Royal Purple in it once and the engine developed a lifter noise. Immediately drained the RP out and found the Lucas at another store and the noise went away. Wierd....

Won't run Mobil one in my engines but that's just my preference. I did have an issue with Fram filters and their lack of quality control. Won't go back PERIOD!

I've had good luck with K&N oil filters in my GTO. I use Wix in my Dart. Factory filters in my 2015 Duramax. Ford filters when I had my 2011 Ecoboost. I believe all NAPA filters are Wix and are good quality filters for a decent price. Harder on your engine, change your oil more often. Especially when carbed.

Some of this is opinion based and some experience based. Do your research and judge for yourself.