Truck has 55000 miles on it. Last trip was just under 800 miles towing at 65 to 70 mph. Average was 10.5 mpg. I believe regeneration occurred three times. Roughly at 200 mile intervals.
Empty I usually average 18 to 20 mpg at 65 to 70 mph and regeneration will occur at around 400 miles.
It's not a perfectly exact event but fairly close.