Hello everyone, I'm new to the group. I recently purchased a 2017 Ram 3500 Heavy Duty, automatic, crew cab, 8ft bed,srw, 4x4 with the 6.7 Cummins. I mostly use it to tow my boat. So during the week it's always running empty. My fuel mileage is around 10.5 to 11.3. When I tow the boat it drop very little to around 8.9 to 9.2 the boat with trailer is around 10k. I'm in Florida so there are no hills or mountains or winter fuel issuses. Is this the normal fuel mileage? Also the truck only has 75k miles on it. Thank for the help.