Oil pressure concerns, fact or myth

Unless you are spinning 10,000 rpm you don't need that much pressure. 66fs is spot on with the 10psi/1000 rpm formula. Now I would rather see a little higher at idle and not too much at rpm. 30 @idle and 50-60@ 5000 rpm but that's just me. I don't have a manual gauge in my cars because I don't want to worry about the pressure. (if it's too low or two high.) Now, before I get bashed for what I just said, I'll bet I have put a million miles on Mopars since the 70's with nothing more than a idiot light.