Fuel management plays into this, I think. The OE stuff that can go +250k miles on thin rings are EFI.
I agree with that.
Yes, and probably other things too. Maybe ringland depth, ring- land clearance, cylinder finish, materials of consruction, piston to wall clearances - hot and cold, skirt lenght, motor rpm, compression/cylinder pressure, and probably a bunch of other quality and quality control aspects.
