Ethanol free anything is good for a stock motor. Anything above 87 octane is a waste on a stock machine. Now if you are running forced induction 93 is the bare minimum.
3" lift, Supercharged 100hp, Water/Meth injection, Dynojet Power Commander w/autotune, SuperTrapp mufflers, 31/10.50/15 Cooper STT tires, K&N, PRP seats, BOR Walker Evans shocks, Flaming River rack & pinion, heater and a crap load of other improvements.
It calls for 93, but will rub on 87 and above. Ethanol isn't the best, but cant always be avoided. We have up to 10% everywhere here in MI on regular. It shouldn't hurt anything, but it is best to avoid Ethanol when the machine may be sitting for extended periods. Ethanol can separate from the gas over time creating problems. A good stabilized will help avoid separation.
I run 93 primarily because here premium doesn't contain Ethanol. One reason I do run the premium is because by design our gas tanks can take on heat from the radiator which heats the gas in it. Premium resists detonating which is the gas igniting when entering a hot cylinder. When the hot fuel hits the cylinder it can ignite more easily with a lesser grade. For the price of gas currently premium is relatively cheap. You wont see better performance, but it can help reduce detonation.