just finished a 2588 mile trip pulling about 12000 lbs. (5th wheel)DW kept track and here is the low 9.4 and high 11.9-2013 Dodge 3500 4x4 with 6 speed stick-truck did a very good job-I was impressed!...
On our trip to Casa grande az I used the math for the trip to the exit 45 fuel stop we use on the way back in April. 10.98 mpg and to our rv park I wanted to use the main tank for the last short day and that mileage was 11.94. New trucks seem to be too high for our 2001 alpenlite and we are old so nice to like what we have. chevman