So i filled the tank with 93 octane when it was still 1/4 full of 87. I put it in eco mode and drove like a grandma. I went 12.5 miles and the trip averaged 24.5 mpg. I guess its possible. I have heard a few things. One, the mpg were quoted using the highest octane gas. Two, drive in eco mode which I don't really know what the difference is. Three, the truck takes a few hundred miles to work things out and maximize efficiency. And four, take it easy on the accelerations. I feel better knowing it is possible but will probably just drive like i normally do. When i do, i get between 19 and 20 which i am fine with. I think these companies need to quit overstating or exagerating the mpg claims. The automobiles should be driven under "normal" conditions. Not in a lab on a treadmill with no wind resistance.