Just returned from my 3500 mile total round trip with the Titan. Went from Massachusetts to Charlotte North Carolina for the nascar races. Then headed up to Lancaster Pa for the rest of the vacation. Mileage was a total of driving down and back, along with a lot of driving in between. Final mpg average ended at around 15-15 1/2 between highway and city. Not to bad for this behemoth of a truck. Only downside was that the wife got a little annoyed with the exhaust note on the really long runs. I ran it at about 70-80 mph. Exhaust gets quite at 80, and gets loud above that. All in all, trip was great. Truck did awesome. Now to see about making the trip to Disney with it next year. Also the truck just turned 71500 for mileage. Just starting to get broken in.