Sorry for the long reply Ive been off the forum for a couple days. Nonetheless, again take it all with a grain of salt, Im not asking anyone to believe me, Im just happy with what I got and maybe it will help someone else, many people are taking it all out of context and not considering the full picture. They are 33's that are worn so probably closer to 31-32, but because of this the trans shifts much sooner with the gears as well, meaning my engine is shifting at low rpm and considering these engines are very low geared, I dont need to use more gas by turning the motor faster, it is a truck not a camaro. Also the low gearing helps me come out of stops using less gas, which I rill nice and slow into it to try to get the best economy possible. Once again, this is what has worked for me, I think a lot of people underestimate how much some minor mods can seriously bump mpg. Consider if the truck is rated for 16 or 17 highway... thats only 4-3 miles per gallon from 20. Some guys claim to get an extra mpg or two from just an injector or tbi spacer. Also many times driving lighter can help gain even a mpg over factory rating- if your willing to get passed by people often haha. Overall, believe it or dont believe it, wont keep me up at night, but when you think about it, it really isn't too hard to believe.