We love beatin this topic to death. I wonder how many threads of this topics been created? I really believe if you want better gas mileage out of your truck, you will need to change your driving habits fully. You cant expect it to get 22+ mpg on the hwy if your doggin it around town in sport mode. If you try and pay attention to your boost and insta fuel meter, you can get the nu.bers you want. Also, I learned, atleast with mines, that the more i drove it in town and jumped the gas, my hwy mileage would also be affected. Itd take one good full tank in eco mode on the hwy to go from 19mpg hwy to 23+ hwy.