I decided since I had an hour and 45 minute ride home today from camping and nowhere to be in a rush that I would try to squeak the best mpg numbers I could out of it. The drive consisted of changing elevations, nothing too crazy but definitely not flat at all. It was nearly all 45 mph country roads and 55 mph highway. I found that the sweet spot on my truck for efficiency is between 50 and 60 mph, just enough to be in 8th gear but you're really staying out of it. I was able to muster 35.8 mpg until I hit my hometown traffic and stop lights. The last 10 minutes brought it down to 34.1 mpg. Being that I traveled roughly 80-90 miles, not just coasting down one hill to see the number I was pretty impressed. I'm not always going to drive like that, but just wanted to experiment.