gas engine at op temp: 10psi idle; 2400rpm 25-45 psi at main gallery

Diesel at op temp: 20psi idle; 2400rpm 30-45psi at main galley

  this is listed as minimum taken off block main oil galley. so yes you seem to be a bit low.
 my 1750 gas idles at 25psi, at full throttle 45-48 psi,  i run straight detergent 30 weight oil