I was wonder what MPG people were getting on there 2wd dually

i drive a 12v 93 stick 4x4 with a hundred gallon tank in back and get 22 or so easily on a 200 mile run. my brother has a 97 dually 4x4 12v with 4.10's and a stick and gets 18mpg empty. mine is tall geared.

cool thanks 24v get about the same mpg as 12v

any of the cummins boys will tell you on average the 12v gets better mileage less power than the 24v. 3 miles difference from what i read and experience

thank you for the info now the planing begins

Well with my setup right now around town i get anywhere from 7-11mpg, towing 18k i get 11mpg and highway i get about 16. But that was before the twins went on. I havent been able to keep my foot out of it enough to get an accurate reading.