Boarder Line Low Oil Pressure

Damn Dan, what are you missing? If the clearances were loose when it was machined then it’s not a problem.

I wouldn’t NEVER EVER build an engine to use 20W50.
You have to admit that there is a problem, the oil pressure that he claims to have at a idle would've been enough for me to start seeing what's going on. I don't know of any engine builder who would build a engine to have such low oil pressure at idle. I've never had a engine that didn't have less s than 30psi at a idle. If the machine shop machined it to be that loose that's not good