Which tune on Non-Ethanol Fuel?

[06 300c ya]

I now have 91 octane non-ethanol fuel readily available in my area. If I give that a try will I need to go to the 91 octane tune (I am currently on the Diablo Tune and running 93 octane E10). Any ideas which fuel and tune will work better?

If I need to go to the 91 tune, how do I do that with the intune? Do I go back to stock and then load the new tune or just go to tune vehicle and pick the 91 tune? Will it keep any changes I had made to the Diablo tune such as fan turn-on temps, shift points, etc?

[mikel]

Just pick the 91 tune and go. it will ask if you want to reset params, choose no, and your previous adjustments will reapply with the 91 tune.

Thanks