In Reply to: G.M. 5.7 V8 oil pressure issues posted by dave#1 on March 12, 2019 at 12:35:17:
I would have to put a gauge on it to find out what 'low' pressure is.
I would then go to either a 10/40 or 15/40.
You can also add 'Power Punch' to the engine, just when adding those 'molasses' engine oil additives, be sure the engine is fully warmed up and run it for another 10 minutes at least after adding it.