MPG
 

I just got done talking to my brother who is a salesman for a local dodge dealer and he was telling me of some feed back he has gotten from some of his customers, I want to see where the rest of you guys are at. He informed me he got MPG feed back from some of the 7-8 diesels he has sold. 3 of the guys are reporting 26-30mpg on the highway and 23-27 hualing all after break-in somewhere after 17k. What are you getting? Is this info real or are these guys just blowing smoke to my bro?

Wow, that sounds like smoke to me. The best I've seen some people report is with the 12V and 5 speeds maybe reaching 24-25 at best. THe newer ones sound like they might struggle to reach 20. I get 20 with mine at interstate speed. Let's see if others can chime in with some magic numbers??

well i know i already told ya on the phone i think somebody can't add i'd like to put it down in official forum print. i'm calling BS.

30 MPG (US Gallon) is pretty tough to get to. Not impossilbe, but not a daily driver or hauler that is for sure. A new truck is even more BS as their power is much higher and as such they burn more go juice.

I have never broke 30 imperial miles per gallon on my truck but I have seen it as low as 9.3L /100 KM which is just 30.3 but it didn't last long and I think the computer was goofed to be honest. My current set up give me 9.7L/100 km and I'm cool with that.

I call BS ! can't believe those salesmen:D

BSMine is brand new money 2300 mi. I'm only seeing around 10.5 to 12.5. I know will get better over time with some tweaking and also when the newness wears off. Anywhere close to 30 my big ass would do backflips. I really don't think backflips are in my future anytime soon though

Allright, thanks guys for the input. I also figured these guys were full of it but I wanted to see if anyone was close or even thought it was possible.

Well always someone guy who just "HAS" to get the best miles per gallon on the planet, and the truth be damned. This seems to apply equaly amongst all brands chevy, Ford and Dodge. My new 2007.5, 6.7 cummins is my 5th diesel Dodge, all have been 4 wheel drive and all have had 6 speed manuel trannys, all were 3500 DRW. I did have a 2001 that got great milage for what it was. At one time I got 17 mpg with that truck empty, and could count on 14 mpg loaded. That is great milage for a 1 ton DRW truck. Before Dodge I had mostly Chevy DRW with Big Blocks if ( and thats a real big IF) you could get 9 or 10 with those gassers you were laughing all the way to the bank.

My new Dodge right out of the Box got 15.6, using a calculator and not that laughable on board display thing. This new truck -- three weeks old, now has a little over 6,000 miles thanks to a trip across the country I just got back from. My milage right now is right at 16 mpg or maybe a little over not much but a little. I expect this truck to get a little better milage with miles but if I am lucky real lucky I may see a 10% increase after about 30,000 miles or so. That has beeen the case with all of the rest. That would make my milage around 17.5 or so. If I get that good I will be so damn happy.

But 30mpg with a Cummins Dodge man that would be a sight to see, not just hard to believe but real hard to imagine, must less believe.

Gunny

Before I bought my truck, I heard a lot of those 25+ mpg claims, and didn't come even close when I got mine. Was pretty annoyed. However, after finding out that my speedo was off, and getting it calibrated, the mileage numbers are decent. With the stuff shown on my sig., I'm looking at regular 19-20 mpg if I keep it under 70 mph, and if I keep it between 55-60 (where required), I do see 22 - 24.

That is hand computed between fill-ups. Running light truck, and being VERY easy on the "go-pedal."

Like the guys up top said, with a newer truck making that much more hp...... I can't see how they would get 30 out of it. Down-hill with a tail-wind maybe?

That's exactly what I see as well. Nothing wrong with those numbers, very happy with it:)

Info on my trip home with fuel mileage. I can honestly say that the predator helped the fuel mileage IMHO.

Mountain driving, Cruise set around 77 MPH
474 miles on tank
32.003 gallons
14.8 MPG

Flat ground, cruise set around 75 MPH
490 Miles on tank
26.905 gallons
18.21 MPG

Flat ground, cruise set around 75 MPH
503 miles on tank
29.98 gallons
16.78 MPG

Some mountains, cruise set around 75 MPH
421 miles on tank
22.2 gallons
18.96 MPG

Total miles driven - 1888
Total fuel - 111.18 Gallons
Average fuel economy - 16.995 MPG
Driving time - ~27 Hrs
Average speed - 69.93 MPH
I just rolled over 27k this weekend and I have a 06 6-speed

I have a 6.7L.2 weeks old with 1700miles. the truck said that its getting between 11 to16 per gallon. im realy hoping it gets better.How many miles do you guys have on you 6.7L ? Did the mpg get any better? my dads Dmax started to get around 20mpg at about 30k.Are dodge's the same?

My 6.7 has 10k miles and gets 13.3 and is going back in the shop for a 4th time tomorrow I wolud really like to see some of that great fuel milage

My 6.7 just rolled over 9,500 miles and get between 14.5 and 16 MPG (hand calculated). I have seen upwards of 18-20 MPG, but that was only one tank. I have bben pretty consistant woth the 14.5-16 MPG since turning over 5,000miles.

I just got back from a 4hr ride up the intersate 87 . the truck said that i was getting 15.8. thats between 65 an 80 my truck was in the shop a few weeks back they told me that they flashes the comp with the new updates. thats all that i know was done.

I got the flash update as well. I am only seeing around 11.5 to 13. I have to do a lot of in town driving tho. I have seen 16ish once i get to take a fairly long highway trip.

Which flash? AU? I noticed a decrease in mileage after the AU flash. I talked to the service manager and he told me the AU flash retarded the timing a bit, which would explain the drop in mileage.

I will tell you that I do a lot of in town driving. It is 12 miles to my business and here in Houston that can take up to 30-45min to get to. One thing I noticed after an 8 hour trip was even in traffic AFTER the trip, my overhead never got below 14mpg until one day it started to drop more and more. This got me thinking that perhaps with all this in town driving I never completed a regenerating cycle. So now once a week I take it about 30miles round trip to complete one. The mileage never goes below 14 unless I start hammering it!

Hope this helps some-

BigD

yeah i guess my truck just sucks for mileage and i have no clue why.......

With my 35's, if I keep it under 70, the best I can do is 19 mpg... thats downhill with a headwind.. In my daily commute, and 35" tires, I am seeing about 15mpg.

i don't think any new full sized pickup can get close to 30 mpg

Ive had 5 cummins trucks and most have gotten about 15-17mpg on average. My best ever was my '98 12valve Reg cab 2wd 5 speed. Very light for a diesel truck. I honestly averaged over 20 mpg most of the time, with 25 ish on long freeway trips. But, like i said, it probably weighed 1500 lbs less than the average truck, since most are 4x4 xcabs

I bought mine a couple of weeks ago. I drive 75 miles round trip daily. At 62 mph I am getting 24.5 mpg. I towed my 16ft trailer loaded at 6000lbs and got 21.5mpg. If I baby it it goes a little higher. In town it sucks literally, Im getting about 12 mpg in town. I have a 2008 dodge 2500 6.7 quad cab short box 4x4. thanks Rick

Is that all hand calculated?

exactly -- cause these new engines with the DPF on them are killing mileage -- all brands are having struggles with mileage on the newer models

I should Draft 18 wheelers and see what the MPG will be, i already know averaging 90+ will give ya 11 MPG

I have about 7000 miles on my 6.7 & I'm getting about 12mpg. I got 18mpg once before I put the 35's on it. I have no muffler & a S&B air intake set-up. When my wife drives it she gets about 16mpg regularly, but she isn't as heavy on the throttle as I am.

Yes, I filled it up, ran it four days for the exact miles. Then filled it up for the exact fuel used. then devided it. Then I done the same thing with towing my trailer. thanks Rick

Is everything stock on your truck?

I have a stock (for now) MegaCab DRW 4x4, 6.7 auto with 18,000 on her, had the turbo changed and all the latest updates, with high idel activated and.....love it. Towing around 7-8 tons, I average 10-10.2mpg at around 70mph. Unloaded, I average around 12.7 to 13 with my normal driving habits. If I grandpa it and never get over 2,000rpms...to include take off, up to 70 mph on the highway, I average 14.5mpg. All of this is hand calculated, I record every gallon of fuel that I put in any vehicle I own, personal or work. I can not for the life of me figure out how some of you guys are getting over 15mpg, maybe my computer is stuck in halla$$ mode, or maybe I need driving lessons to get over what I am averaging now. I have noticed that if I place it in tow/haul mode during take off, then switch back out after 60mph, I average better than if I don't do this, maybe eliminated some wasted power at the converter.

I'm getting about 17-19 around town, and have gotten as high as 26 on highway empty. I have found the overhead to be off about 2 or so mpg. I have found like largedakota said, that in tow haul i get much better mileage. Is it bad for the tranny to leave it in tow haul all the time? If it's not I might start doing that. I have an hour drive to and from work everyday, half interstate half 45-55 mph speeds.

It should not hurt a thing running in T/H mode. In fact they should of called it town and haul mode not tow and haul as it allows the TC to lock up in 2nd gear and up thus giving a bit better mpg for town driving. I have also noticed that if you want to improve your mpg in a CTD you don't drive it like a V8.

JMHO

I've always been pretty light on the skinny pedal. I'll ride it once in awhile, but for the most part I take it easy.

Again, I can't for the life of me figure out how to do that either. That big Dodge just likes to ROLL too often, I don't intend on it...just kind of has a mind of it's own and says..let's go. I'll keep trying but I hate those little bumble bee muffler kids having all the fun.....

7000 miles total ( hand Calculated) 13.2mpg ave., best was @55mph (1 Time lol) 15.4mpg, ave @ 70mph was 14.7mpg. Added Edge with Juice - last 1100 miles @ 70-75mph average 16.8 on setting 1 and setting 3. Amazed at how often it regens and what it does to mileage. No wonder I couldn't make sense of my averages before!

I make a few trips to Louisianna on I-10 and I have been getting 18-18.5MPG when I stay on the Interstate. Normally I get around 16 Heard A few Horror stories of guys not getting more the 12-13 I would suggest checking the Intercooler line and make sure the Clamps are TIGHT.

This may sound like an odd question, but those of you who get the higher mileage out on the highway, how much traffic is there on those roads?
I ask that, I've noticed that the best mileage I get is when I'm following people, I'm in their draft, or the draft of the vehicles that I'm in and out with in traffic.

The rpm is a killer. Driving the speed limit keeping it at 55-60 your rpm on a 6.7 cummins will be at about 1600-1700 rpm and you will get 17 easy. Put some good conditioner in and accellerate easy and this is easy to get. When i drive like i am
off to a fire my mileage is way lower.

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