I’ve never paid any attention to the DTE on any of my Rams. I record my gallons purchased and mpg on every fill up (old habit) so I usually have a pretty good idea what my actual mpg is. When I towed with my ‘12 Ram I got about 10 mpg (which meant I needed to plan on refueling at about 500 miles on the trip odometer). I look forward to towing with my ‘18 Ram as it gets better mileage. Adding an oversize tank is a significant improvement to these trucks.