I posted to help educate myself. I am trying to determine the correct viscosity for my engine. I know the manufacturer recommends, 10W30 but everyone here likes the 20W50. My
oil pressure is 53 psig anything above 1500 rpms but at idle is get to about 30 psig with the 10W30 at 100c
oil temp. It appears eveyone on this site likes to see 45 psig at idle. Who know who is right????