I run good ol' conventional Valvoline 4-Stroke Motorcycle oil in 20w50 and 10w40. 20w50 in the summer and the bike shifts like butter right through the entire oil change interval.
I spent too many years obsessing about oil on BITOG (bobistheoilguy.com). After over 5k posts, reading hundreds of UOAs (Used Oil Analysis) and oil filter picture threads (yes we cut them open and dissected their quality/construction), I concluded the right spec oil (JASO MA) in the right viscosity (see your manual) at recommended intervals, is all that is needed.
I personally consider the valvoline 20w50 to be the best shifting oil I have used.
If you want to extend your intervals, consider a quality synthetic that is known to hold visoscity, or up your viscosity to compensate.
I got the Valvoline on sale at Walmart for $4/quart. I also purchased several K&N Oil Filters for $6. So an oil change is costing me less than $20.
Two wheelz for realz!