I do run Mobile 1 10w30 in it, but only after the normal break-in period...can't recall the hours. I think the rings are seated, has good compression and power, and the oil usage came on quickly this last year, I would say before 180hrs it never used a drop. It may be burning some oil in #2, but if it is, it's not enough to foul the plug out bad like #1. Did I mention that it's a 2005 model?
I wouldn't think the top ring would be bad with the compression I was getting. I'm thinking either worn or broken oil ring. I can try and see it though. Not the intake gasket, I was wondering about the intake valve seal, unless that's what you meant. Best I can tell by appearance and sliding the valve through it the seal seems good. I'll get some pics of the seal and valve tomorrow. I did see some burnt marks past the seat and plenty of carbon or something on top of the valve.
I'll definitely check the gaps when I pull them. I thought about popping a new seal and head gasket on it and trying it again and then with heavier dyno oil. If that stopped it I'd know it's the rings. I guess I should've tried that first.