what is the statistics behind the claim for gas mililege for this tune is there real studied info that supports your claim?

i would like to see more support and upgrades for older models 99-2003, maybe one that gives horse power and saves on gas, in support of diesel's

I have a problem, my battery went bad and so I disconceted it. And hooked the power back up, well later on in the week i wanted to change the program setting from tow tune to economy it said that the original was not saved, so when I went to back it up it doesn't work. i cant program anything ...