Well, to start with, a 2007 F-150 with the small 4.6 engine is not a vehicle that is going to get "good" gas mileage, but I'm sure you knew that before you ever bought the vehicle.
There really is no such thing as a "gas mileage chip" per se - though we can usually get you some mpg gains from our tuning.
Also, your vehicle cannot use a traditional "chip", you have to have a flash device to actually flash the PCM - in the F-150, that started with the 2004 model year, just FYI.
OK, with all that out of the way....
We can provide you with a hand-held tuner that will have 3 different custom tunes, and we can certainly do a tune that is designed to get the best possible fuel mileage for you - we have done that a number of times. Now I will point out that we can't make an iron-clad guarantee of better fuel mileage, as that is determined by numerous factors beyond our control, like how the vehicle is operated, maintained, etc. We also have no control over what fuel people use, as many people make the mistake of using the cheapest gas they can find, which just lowers the fuel mileage and vastly increases the deposits inside the engine - just to give you some background info on this.
All of that having been said, I think we can improve your fuel mileage - most of our customers who use good gas and who can keep their foot out of the firewall (so to speak
) do in fact see improvements in fuel mileage from our tuning, that is a common by-product even in our performance tunes, actually.
So I think that is perhaps the best way to put it to give you an accurate picture - all else being equal, I think you will find we can improve your fuel mileage a bit - now it's not going to be like 3-4 more mpg, it's usually more like in the 1.0-2.0 mpg range, with the highest gains reported occasionally topping 3 mpg - I'd say think more along the lines of what the average tends to run, as a rough guesstimate I'd say 1.2 - 1.7 more mpg usually. But that is still a very nice percentage gain, as we're not starting of with 25 mpg in the first place, so any gain you can get is money in the bank, and you'll have better performance as well.
To go over the details, etc., please give us a call at our number listed below & we'll be happy to help you with this, and go over all of the details, answer any questions, etc. for you.
Thanks for your post, & we hope to hear from you!