Spot on, Jerry!
I'd have to say that has *nothing* to do with the pressure generated by the oil pump. But from
the pressure generated by the crank agitation... and before you say it; yes. that *is* what the
crank ventilation "system -- whichever you have" is for. But on every (older) rig I ever used the
20-50 on, ultimately, and suddenly began to "weep" a little oil. But the pressure gauge indicated
much better pressure, and earlier on. and no puffs of blue smoke at startup, or driving down
the road.
--Chris
