"You can’t get the pickup tube too big. We are lucky today because I can run a 0w-20 oil in my junk and make as much power as I want and not have issues. That 20 goes up the pipe much easier than a 40 or 50 or even a decent 30 grade oil.
Just curious...what kind of main/rod clearances are you using with the thinner oil?
That does take some load off the pick up. You can only get the gerotor to pull X amount of depression. You can’t necessarily make the pump “suck” harder on the inlet."
Depression, sucking, etc lol