I pull a 40 ft toy hauler dry weight is 13300. Plus a jetski behind too. Loaded I have o believe with 2 harleys inside full of water 40 gallons of gas and the jetski I am close to 16000. If i drive nice 60 I may see 11 but most of the time 70-75. At that speed I am at 9. with a head wind it get as low as 7.

 

Buy a Ford and get that kind of MPG empty........

 

Try a taller tire like a 315, it tends to lower your rpm on the highways and such.

 

You are getting almost twice the mileage my buddy with a V10 Ford gets pulling a 3500 lb. trailer.

You have a huge amount of wind resistance from the camper. I get almost the same mileage pulling my 4K 18' travel trailer as I do a 24' enclosed cargo trailer weighing twice as much. Wind is huge.

 

wow , Guess I'm lucky. my six speed 4x4 06 gets a solid 13 with a cab over camper and a 15k trailer. overhead says 14.5. I get around 16 with just the camper and then the overhead says 18.

 

Sounds about right, my 04.5 I get 8.57 mpg with a enclosed 32 foot car hauler @ 70 miles per hour, if there is a strong head wind seen as low as 6 mpg @ 70.

flgc