Valvoline VR-1 vs. Lucas Hot Rod oil

I don't understand the question. The bearing clearance is set in stone. The oil you run doesn't change that.
If you have a motor with tight bearing clearance. I don't think you want to run thicker oil like 20w50
I was just wounding the 10w30 oil. What clearance your bearing should be?
I see people set up motors from .0015 to .0030. Just wondering if you are on the tight side or if you are the loser side of clearance does the weight of the oil matter?