Which computer programmer to get???
 

I have a '04 F-150 XLT 5.4L 4X4 A/T T/P 60K+ and get terrible daily mpg's. Looked at different programmers and I am unsure which one to get. I think this is the way to go without sinking too much money into it. I want to be able to improve mpg's mostly but would like to change the setting on the fly from the cab if needed to stock or to more hp. Any body have any recommendations, thanks.