For the crankcase, oil made for motorcycles has higher shear strength and makes for smoother shifts and less wear than the regular stuff. Stay away from real slippery stuff for the Blaster, though. The Blaster clutch is wet. W-E-T. I tried synthetic in my Banshee and the clutch slipped. As far as 2-stroke, stick with one brand of TCW-3 rated injection oil for the blaster.
Best bet, get the stuff your dealer reccommends. You've just spent thousands for hardware, a couple of extra bucks won't even be noticed. And you know where to get that.