Just comes down to every build is different. When I ran the cast crank/filled stock block with the diaper. It had a lot of bearing clearance (.0035 on mains), and with the filled block/diaper the oil would run hot.

After the first pass of the day it was always in the 180+ range, and that was with an oil cooler on the car.

I found when I tried thin oil the oil pressure would be uncomfortably low, so it always had thick syrup in it for those reasons.