I'm Not sure what tune to use? I Always run 87 oct. gas. All my truck is stock. Looking for the best MPG I can get that's all. And maybe on and off with AFM around town. How can I get what each of these tunes settings are?

I sold my 2006 F150 5.4 4X4 and I see it still remembers me by that truck ...

part # 138414 U-7151 F150
ver. v.8r21
08-03-2006

I'M NOT LOOKING FOR MORE HP., BUT THE PREDATOR MADE A LOT OF DIFFERANTS IN THAT AREA. IS THERE A CUSTOM TUNING THAT WILL HELP WITH MORE MPG. I'M RUNNING A STOCK F150 5.4L 4X4 AND DO NOT HOTROD. THIS IS MY TRIP VEHICLE. I GET BETWEEN 17 AND 18 MPG NOW ...