I also have an 05 F-150, and I did both the 87 performance and 87 tow tunes. The only reason to get the tow is if there is a chance that you will be towing a lot. I havent used it yet, so I cant say anything about its gas mileage, but you should get better mileage with the performance tune unless you drive like I do... mine is the same before and after the tunes... lol
|