I have a 2018 and I get 11 plus MPG. I have talked to two different dealer service people and both said "it is what it is". Not happy with that. It seems to wind out the gears on take-off, down shifts when coming to a stop, holds rpm when you let off the gas. I think its stuck in tow/haul mode. When I turn on the tow mode nothing seems to change. Other trucks I had would at least drop a gear or two going 70, not My Titan XD tach stays the same when you push the button. Dealer won't even look at it. With the small gas tank I'm sick only getting 220 miles out of a tank. The 11 mpg is combined. I did fill up and drove all highway and got 11.8 mpg...….Wow. What should I do? I like My truck but.....OMG!