Almost all oil threads be pointless. 10w40 vs 15w40, rotella vs motul, synthetic vs regular, all be complete bs. Change air filter every other ride. Change oil often, every 3 full rides max. Clutch debris usually bigger factor than type of oil begin with. Maybe in cars it make big difference, but in dirtbikes, service interval be big thing.
And you base that one what research/knowledge? That statement has no basis whatsoever unless you can back it up with some useful relevant information