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Go Back   Dodge Cummins Diesel Forum > 4th Generation 2010 and up 6.7 Liter Cummins > 4th Gen Performance Parts Discussion
4th Gen Performance Parts Discussion Discussion of Performance Parts For the 4th Gen Trucks...NO ADVERTISING

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View Poll Results: Current MPG's
9/12 12 7.64%
12/14 34 21.66%
14/16 44 28.03%
16/18 36 22.93%
18/20 19 12.10%
20+ 8 5.10%
Bacon. 4 2.55%
Voters: 157. You may not vote on this poll

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Old 01-06-2013, 12:32 AM   #1 (permalink)
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Miles per gallon.

Okay, I have been reading horror stories about MPGs on these 4th gens. What I want to hear, is your initial MPGs followed by say MPGs after 10k miles, and maybe MPGs after Deleting.

I have been in the neighborhood of 16-21. Just depending on how I drive. I have got as good as 23 on the freeway doing about 60 with the cruise (yea, I know, not no 80mph). No deletes yet, running stock tires with stock PSI, and a cold front. That's it.

Lets hear it.
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Old 01-06-2013, 01:14 AM   #2 (permalink)
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I had 26000 on my truck before I deleted couldn't get any better than bout 15.5 to 16 that's a combination of highway and in town driving and that was taking it very easy. I am now deleted and im seeing a huge improvement in fuel mileage on the highway I'm getting bout 21 mpg at 70 or so. And in town getting bout 15 to 16. I think it's totally worth every penny to delete.
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Old 01-06-2013, 01:17 AM   #3 (permalink)
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How are you getting that with a stock truck? The best I got before I deleted was 14 mpg going about 60-65 mph. Now deleted I can sit around 18 mpg going 75 on the freeway. If I really try I could probably break 20mpg but my foot doesn't sit at 65 mph. I deleted right around 5000 miles
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Old 01-06-2013, 01:18 AM   #4 (permalink)
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I was getting 15-16 hwy before deletes, and about 12-14 city. After deleting I can get 18 on hwy with cruise set at 65 (have seen 21 according to evic, but highest hand calc was 19 even), and about 14.5-15.5 city driving. I have a delete pipe, and xrt on mild, timing 2 no att

I think some people bend the truth about their mpgs. I set my cruise on 75 and I can never get more than 15.5 mpg. Truck seems to have a sweet spot right at 68 mph, so I usually try to keep it there to yield best mpgs.
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Old 01-06-2013, 01:20 AM   #5 (permalink)
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12-13 combo all stock for now under 5k miles
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Old 01-06-2013, 01:22 AM   #6 (permalink)
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For the record, my rig has approx 28xxx miles on it... Is that possibly why?
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Old 01-06-2013, 01:36 AM   #7 (permalink)
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Quote:
Originally Posted by Frozen Cummins View Post
For the record, my rig has approx 28xxx miles on it... Is that possibly why?
I was told by the "SALESMAN" at the dealer the MPG would go up after 20-30k miles.
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Old 01-06-2013, 02:21 AM   #8 (permalink)
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Right now with my 12 3500 stock everything with 1300 miles on it I have calculated a few top offs. Usually about half a tank. Generally about a 50 50 mix of highway and city with several short city jonts in there. Have not towed anything yet and did a little mountain logging road driving.

First time got 14.3 hand calc. Second got 15.5, and most recently 13.9

Would like to see better but atleast its not the 10mpg my truck I traded in was getting doing the same stuff.
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Old 01-06-2013, 02:38 AM   #9 (permalink)
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I see 17-18 driving local country roads with some in town driving and 20- 22.5 freeway at 65-70 deleted. Was 14-15 and17-18 non deleted
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Old 01-06-2013, 03:00 AM   #10 (permalink)
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First tank was 15.58 mpg
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Old 01-06-2013, 05:04 AM   #11 (permalink)
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I have 2010 30,000 miles with 4.10 and 35 inch tires. Before deleting mix of high way 70 mph and and county roads with using cruise control alot I could not get better than 13 mpg. After deleting mostly winedy mountain roads and city driving I got 16 mpg.
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Old 01-06-2013, 05:16 AM   #12 (permalink)
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Trip to Texas was the best mileage with my wife driving. 19.7 MPG / IMP gallons. Not deleted. Have an booking Jan 14 for the delete. Mini max, 5 inch TB MBRP, and OD tune and Pyro. can't wait
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