I don't think there is a true big gain with the standard 5/64 or 1/16th gapless rings - I have used them on engines that have a little extra clearance from re-honing multiple times - they seemed to seal pretty good and lasted as long as a conventional ring. The new ring technology is the steel top and ductile second .9mm .9mm with a 2mm oil ring - How these new thin rings are manufactured is an interesting read and there is a measurable power gain with the thin ring packs