I will only be pulling the trailers about 6 weekends a year, usually about a couple hundred miles, by bigger tires I mean like a 275 or 285. So I am wondering if the 2500 with 4:10's revs the same as my 1500 with 3.92's shouldn't the fuel mileage be about the same, and does the extra gear in the 2500 make that much difference? Thanks guys for the input.

 

I get about 7-8 towing with my 1500 with the 3.92 and anywhere from 16-20 depending on conditions and my speed on the highway,

 

265 70 17 is the stock tire size. A larger tire will take more effort to turn, this reduces tow rattings as more revolutions are needed to move a identical whight over a smaller size tire.

Im pretty sure the 2500 power wagon has 456 rear end, stock tire size is 285 70 17, if towing speed is not a concern, or you have no drive to go over 75 mph, a power wagon will be your best bet for towing.

373 410 or 456 backed up with a 6sp automatic is going to be close in mpg ...

THe best way to get more hp and gain at mpg is to dump the y pipe run two mufflers, or invest in a cat back EX.

AS for THe 6.7 CTD, yes it will tmore and better, but for the headachs of all the emmisons crap on it, maintance of the dpf filter and = milage numbers to a hemi running empty, you really have to question just how bad and how much you want to tow..

 

The 1500 is much lighter and has MDS if you haven't disabled it. I used to get the same mileage with my 08 1500 hemi.

Now with my personal 2500 Cummins, I get around 16 empty and 11 towing with it.

 

I've got a 2012 2500 Hemi Crew with the 4.10's so it has the new 6 spd. With the 285 tires (installed when new), the rpms are the same in the highest gear as my 09 Sport with the 3.92's. (you can confirm with the chart on the other forum) But the mpgs aren't the same due to the 2500's extra weight and lack of MDS. I avg about 14 mpgs, 10-11 mpgs when towing. That is hand calculated which is always different than the computer. And yes, the computer was adjusted for the new tire size at the dealer.

I personally think that the mpgs will vary greatly depending on where you are located and what type of gas is available. We can only buy the crappy "up to 10%" ethanol stuff here and my terrain has a lot of hills.

The Powerwagon is not designed for towing as big of a load as a standard 2500 and has a much lower towing rating probably due to the tires (D rated).

 

I am from Canada eh, and just out of curiosity I did a mpg conversion from US gallon to Imperial gallon, 1 US gallon= 0.83 imperial gallon, (supposed to use litres here but I am old school gallons) So if your getting 14mpg per US gallon that should equate to 16.8 mpg imperial.....or am I not correct on these figures?

 

I hate metric, Liberals screwd us Canadain's back in 1975, any how to my understanding, a US gallon is smaller than a imperial gallon, US mpg rattings are more realalsitic than transport canadas numbers.

3.79LT = one US gallon, basicly a jug of washer fluid..

AS much as I love the hemi, the extra hp increase and torque numbers behind a crap box 6sp automatic is most likely going to average out at 12mpg US when towing say 8 to 9 thousand pounds on level ground.

This is after the truck is broke in.

Also facter in the hemi needs mid grade... and 16 spark plugs, I don't know if the new engines are still using copper plugs.

Thiers no doubt in my mind that what ever gear raito you run, the hemi will do just fine towing, but it is and allways will be a hungery beast.

I curse chrysler and dodge for no longer having the 6sp man transmisson with the hemi, the G56 6sp man is ued in the CTD and behind my hemi..