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I've done the calculations in the 87 and 91 tunes. And even with the gas price difference my mileage is, for me anyways, well worth it to go with the 91 performance tune for horses and mileage.
so you get better mileage with the performance tune? i just put the performance tune in mine and have only driven about 20 miles since so i can't calculate my mileage yet. it seems like i gained almost 2mpg with the 87 tune (over stock). i'd have to run through a few tanks to confirm it though. i've been using fuelly.com to track my mileage for the past year so i have a solid baseline.
tell him 75 and thats it i wouldnt go no higher than 100....and thats if its not stolen ask for the serial number and call s/c to see if its stolen or not....that way you dont have issues like i did....i bought a stolen one off ebay...
I been riding around actually looking at the grades of gas...I live in the dfw area of texas, and no one sells the 91 octane gas...I only see 93 octane...Is their even a tune for 93 or all yall just running 93 on the 91 tune? Also what choices of gas does it give you with each tune? Help I want to order tonight!!!
the performance tune requires 91 but i put 93 in as the station i was at didn't have 91. it won't hurt to run the 93, just cost a little more. as far as i know, the 91 is the highest that you will need with any of the tunes.