'03 2500 Dodge/Cummins 305/555 HO with the NV5600 6 speed manual 3.73 axle pulling a 11200 lb very flat nose/square corner '97 5th wheel trailer.
Empty truck on the highway averages 21-23 mpg depending......
Don't have a city out here as were all rural...
Pulling the 11200 lb 5er averages 12-12.5 mpg all pencil figures