2007 Ford Mustang GT

Curious if the standard 91 octane tune is worth loading or leaving it tuneless as i run the premium gas. Only other mods done are Flowmaster axle-backs and an SR performance intake. Thanks for the help! Never used a tuner before so I do not even know how to get custom tunes.

[mikel]

Yes, load the 91 tune and enjoy the additional 20-25 rwhp