The RPI/Powerchip tune is adaptive, i have used straight 100 octane, mix 91 and 100 and pure 91 octane...I'd call RPI and see if they can give out a deal for the RPI ram ir tune and software...
Or you can go to Mfest 3 in April and test the tune for yourself as Powerchip will be onsite along with RPI (not confirmed yet) to flash your ecu and test if for yourself on the road or at the track event at Mfest...if you like it you can buy it if not they will flash your ecu back to stock...Now If ESS sponsors this year then they can likely offer this aswell
