most blasters should run 93. that oil injection is crap. plastic gear, plus at high rpms it cant keep up and wont pump enough oil. premix your own gas. i run amsoil in everything, oil is preference, idc what anybody says. people use what they like. i myself prefer synthetics, and amsoil is my choice, for all fluids.
you dont need the block off kit either. render the pump useless, and leave it. remove the tank and lines, remove the pump, take out the gear and drive shaft. install pump with new gasket. pump wont work, it is now a block off plate. saves you money, does the same damn thing.
dont rely on that oil injector system. its junk. its there cuz blasters are an entry level quad, and its easier to use than having to premix. a selling point. a more advanced rider/owner would do what every other 2 stroker does......mix his gas.