Brand new 2006 DC, 4X4 TRD with about 1200 miles on the clock. Worst mileage was 15.8. And that was going into the mountains, even using 4wd low on a trail. Most of that trip was on dirt roads as well. I got nearly 17mpg on my last trip to Denver and back + 100miles of city driving after my return. This is a stock 4x4. No tricks or mods. I seldom lead foot it. I went 75mph the entire 200miles to Denver and back. I expect better when the truck is broken in and I am not doing so much stop and go. Newer Tundras have 5 speeds. I am sure that helps. 39 years old and knows how to do basic math
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