Just drove my XD on a 500 mile round trip and am very pleased with the results. On the first leg of the trip I went 80 mph at 2000 rpm and averaged 19 mpg. On the way home same speed and it got a little better. The ride was very comfortable and the truck was smooth and quiet. I can count how many times someone would pull up next to me and ask me if the truck really has a Cummins in it.
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