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My father is looking at getting a new 6.7 he is wanted to know honest MPG on these trucks stock. It will be a CCLB 4x4 mainly used to tow the boat, and a small tractor. Please let me know honest calculations, as this truck will remain stock no tunes or deletes. Thanks. Also any other advice about these truck would be nice, I dont know much about dodges. It we either be a 2012 brand new or a slightly used 2010-2011 Thanks in advance.
 

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I get 14-16 avg per tank of diesel with 50/50 city and highway driving.

I would expect you would see low teens with those loads.
 

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Just filled up yesterday 12.0mpg in town driving, couple weeks ago towed 26' travel trailer BP to Dallas, Tx 8+ mpg, came home empty 17+mpg. Truck only has 6900 miles.
 

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I've only got 1200 miles on my 2012 so far but I got 15.2 on 1st tank- mostly highway, 14.0 on second tank which was mostly highway towing a 3000lb trailer with 1000 lbs in bed, 3rd tank was mostly highway and got 16.9 (empty). Hoping it gets a little better as it breaks in, but this thing is a hoot to drive no matter what. It is a 3500 CC LB.
 

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I was getting around 14 to 15 mpg, empty, stock.

I did the deletes shortly there after, with about 1,300 miles on the clock. Haven't hooked up to anything yet. My truck isn't even broken in yet! Even with the deletes done, I haven't seen a huge gain yet, but I need to run the truck more to find out. Running about a 1/4 tank through it, I hand calculated 16.7 mpg, empty, doing a mix of 65-75mph, mostly interstate driving. I'm hoping it will improve a lot more then that.
 

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Everyone tends to scoff at this, but normal for me is above 20 MPG. This is pulling a 3000 pound utility trailer. It hits over 21 with no trailer. These are hand calculated and not guessing. When looking at loading profile on Starscan it shows very conservative loading and obviouslly excellent throttle habits at 60-65 mph. During regen it will drop perhaps one mpg for 20 minutes or so every 300 miles.
You can't argue with 600 miles before low fuel light comes on.
 

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Everyone tends to scoff at this, but normal for me is above 20 MPG. This is pulling a 3000 pound utility trailer. It hits over 21 with no trailer. These are hand calculated and not guessing. When looking at loading profile on Starscan it shows very conservative loading and obviouslly excellent throttle habits at 60-65 mph. During regen it will drop perhaps one mpg for 20 minutes or so every 300 miles.
You can't argue with 600 miles before low fuel light comes on.
Lots of variables to factor in, of course, but I wish my truck got that kind of mileage! Yours looks like a 2wd? Driving habits are huge.
 

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My father is looking at getting a new 6.7 he is wanted to know honest MPG on these trucks stock. It will be a CCLB 4x4 mainly used to tow the boat, and a small tractor. Please let me know honest calculations, as this truck will remain stock no tunes or deletes. Thanks. Also any other advice about these truck would be nice, I dont know much about dodges. It we either be a 2012 brand new or a slightly used 2010-2011 Thanks in advance.
My realistic average is 14.0 mpg. This is combined City and Highway driving for me probably 60/40. I noticed better fuel milage since about the 10K area.
 

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My average w/ 50/50 driving is 13.5mpg. I can get 16-16.5mpg on a full tank of all highway driving at 70-72mph. All of my figures are hand calculated, empty, on flat roads. When compared to the EVIC readout, the computer reads about 0.5mpg high. Hopefully the mileage improves as I put more miles on and get a tonneau cover.
 

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stock

I bought mine and left CT for FL 1300 miles. I got 16 on the hwy at 72 mph and on small roads at 60 I got 18. then I towed my fifth wheel home from FL to CT and got anywhere from 10 to 14 depending on hills etc. Hope this helps and hope it gets better, after deletes


My father is looking at getting a new 6.7 he is wanted to know honest MPG on these trucks stock. It will be a CCLB 4x4 mainly used to tow the boat, and a small tractor. Please let me know honest calculations, as this truck will remain stock no tunes or deletes. Thanks. Also any other advice about these truck would be nice, I dont know much about dodges. It we either be a 2012 brand new or a slightly used 2010-2011 Thanks in advance.
 

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My average w/ 50/50 driving is 13.5mpg. I can get 16-16.5mpg on a full tank of all highway driving at 70-72mph. All of my figures are hand calculated, empty, on flat roads. When compared to the EVIC readout, the computer reads about 0.5mpg high. Hopefully the mileage improves as I put more miles on and get a tonneau cover.

Yep...that's about right...same type of vehicle with Rebel Snug Top camper and my fuel mileage is only SLIGHTLY better (14.2 with 50/50 and 16.8 strictly highway). Towing a 28 foot pontoon boat I get 13.9 but understand there are a LOT of hills to get to the lake :shock:
 

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Check out my fuelly log in my sig. The obviously low ones are from towing my 5th wheel out and about. There's a couple odd tanks (6.6MPG) in there because of what I suspect was a partial fill due to an air bubble (truck may have been sitting passenger side high when I fueled so quite a lot less went in than normal). My real worst case is 7.5MPG and thats basically WOT for the whole tank due to wind and terrain. Normally I avg 13-14 mixed with a 60 or 70% highway miles.
 
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