You will probably feel the difference. And I feel the cleaner gas is better for my car. I only use 93 and sometimes 91 in my Stang. But the "Tune" has a lot to do with it also. SCT "custom" tune on Mustang, Diablo Sport "HP" tune on Wife's Camaro, so I have to run 93 in both cars.
07 GT. PREMIUM SCT: CUSTOM TUNE by "MUSTANG SPECIALTIES". FULL MAGNAFLOW COMPITION EXHAUST, LT. HEADERS AND X PIPE, LMR: GEN2 2010 STYLE HEADLIGHTS, RAXIOM: 2010 SMOKED COYOTE TAIL LIGHTS, WHEELS: STAGGERED WHL 22X8.5F-22X10R MORE LISTED INSIDE.