Yeah I got a Xcal 3 and it sweet! You can change so many things before you run the custom tune too. Like tire size, idle speed, speed limit, etc. However I am using the 93 Octane on mine now and I have significant difference in power. However I am gettin the same mileage as before which is unexpected. But the main thing that I love about it is the shift points in my tranny. So much harder and firmer. No more crap gear changes. I can mash the gas and barely tap the brakes at the same time and roast a set of tires quick lol. I am thinking about going to the 89 or even 87 Octane tune to see if my mileage gains are any different. I just hope I don't lose the performance from the high test gas. Has anybody done that and got different results?
-2011 F-150 Lariat: 5.0 "Coyote" V8, 6-spd Auto (6R80E), 3.73 ELocker. White Platinum Metallic Tri-coat.
-1992 Ford Ranger: 4.0L OHV, 5spd (M5OD-R1), 3.27 Open.