all programmers do the same things some offer more in one thing than a norther will. if you find one that has three setting you can use it to help with towing, performance, and MPG some have little pods that mount to the dash others need to be plugged in and setup every time you need to change from one mode to the next. all come with what is known as caned tunes the higher end tuners come with the option to add custom tunes.lets talk about if you tow a lot or haul a lot of stuff and need to have good MPG to its not going to happen it's one or the other. remember you have a 6k LBS truck not a little focus and the thought of good MPG well its hard to get that mass moving with keeping MPG high. hope this help in some way and good luck.