Let's start over......
I'd go for the 91-93 octane tunes and if you get 3 tunes then have one the crap gas mileage tune for if you are traveling and can't get good fuel
you can run more timing on higheroctane fuel making the motor work less
when i drove my green truck from Winslow AZ to Roswell NM (on one tank) it was tuned for 93 octane and I averaged right around 29mpg that trip
when i drove my green truck from Winslow AZ to Roswell NM (on one tank) it was tuned for 93 octane and I averaged right around 29mpg that trip