Just got home with my fifth wheel trailer.

[Endangered Species]

the hypertechs are junk in IMO. no offense.

I had an 05 cummins 6 speed, with a bully dog. it got pretty good gad mileage towing. Had a juice edge on the 2000 and it was awesome.

but i no we are going to lose gas mileage but im with u I think we can get between 10 and 12.. not bad. is your dads dually 4x4?

Casey

Using the Hypertech and running empty it got great milage - mid 24-25 MPG.
But with the trailer hooked up it still got 9-10.

Yha its a 4X4 dually.