Dodge Cummins Diesel Forum banner

1 - 20 of 56 Posts

·
Registered
Joined
·
1,171 Posts
Discussion Starter #1
Ok, I've had my new truck for about 1 week and the mileage SUCKS.:CRY:

I am getting between 10-12 mpg mixed driving. My 2002 I traded in got 16 on the same exact routes.

So I have been looking at the things I can do to help mileage. Here is a list with pricing.

DPF delete - 3-4 mpg, $842
EGR delete - 1 mpg?, free?
Water injection - 1-3 mpg, $949
MP8 - 1-2 mpg, $385
Edge attitude - 1-2 mpg, $639
Goerend torque converter 3-4 mpg, $1000?

Any other thing I missed. Or if you have a different opinion of the improvement I stated or the cost, let me know.

These all seem like reasonable things to do, and should pay for themselves in less than 6 months.

If I do all the above what kind of mileage can I expect? I know you can't add up the savings or I would have to pull over every day and drain my tank.:lol3:

I really love my new truck compared to the 2002 I had but I feel terrible having a inefficient fuel hog. I know this engine can be made way more economical than it is stock.
 

·
Banned
Joined
·
393 Posts
Air intake....Get a good air intake, stage2 AFE, i put one on and immediately seen 2 mpg.
 

·
Registered
Joined
·
362 Posts
Yeah my MPG improved after the programmer, cold air and exhaust. As long as I can keep my foot out of it. Your mileage will improve somewhat after you get a few miles on the ole' girl. You just cant jump right into you gotta warm it up a little.
 

·
Registered
Joined
·
2,885 Posts
I would get a 5 inch straight pipe setup for late model 5.9 (they are on ebay for 270 bucks!). Buy the DPF fooler kit from H&S or BAPD and add an Edge Juice w/a. You can do the dgr delete afater the dpf is off. Then I would change the intake system to one that flows better. Lots of our members have reported an increase in fuel economy with an MP-8 device. If you add these mods and keep your foot out of it I would say that is about the best you are going to get till some more devices are devleoped. Good luck with your new truck!
 

·
Registered
Joined
·
2,340 Posts
Put all of that on and you got 16 mpg improvement. I wished it worked that way. You may see 3-4 mpg improvement with any or all of what you listed.

Randy
 

·
Banned
Joined
·
393 Posts
Also, try check into the dyna trac front hub conversion. One of my clients reported a 3mpg increase after he switched hubs.
 

·
Registered
Joined
·
573 Posts
Id probably do the intake, exhaust and most importantly a chip. I gain 4mpg running my chip from off to level 5(and a ton of smoke too :))
 

·
Registered
Joined
·
681 Posts
Yeah you should look into hubs and also look into Gear Vendor they make a double overdrive.
 

·
Premium Member
Joined
·
713 Posts
Ok, I've had my new truck for about 1 week and the mileage SUCKS.:CRY:

I am getting between 10-12 mpg mixed driving. My 2002 I traded in got 16 on the same exact routes.

So I have been looking at the things I can do to help mileage. Here is a list with pricing.

DPF delete - 3-4 mpg, $842
EGR delete - 1 mpg?, free?
Water injection - 1-3 mpg, $949
MP8 - 1-2 mpg, $385
Edge attitude - 1-2 mpg, $639
Goerend torque converter 3-4 mpg, $1000?

Any other thing I missed. Or if you have a different opinion of the improvement I stated or the cost, let me know.

These all seem like reasonable things to do, and should pay for themselves in less than 6 months.

If I do all the above what kind of mileage can I expect? I know you can't add up the savings or I would have to pull over every day and drain my tank.:lol3:

I really love my new truck compared to the 2002 I had but I feel terrible having a inefficient fuel hog. I know this engine can be made way more economical than it is stock.
If you just do the exhaust and egde you will get 4-8 mpg with that set up.:thumbsup
 

·
Banned
Joined
·
393 Posts
ive seen 10 and 12 speed trannys with geer vendor...how do they work?
 

·
Registered
Joined
·
108 Posts
First of all, please fill out your sig so we know your truck's specs.

Next get her broke in before any mods.

You should see some mpg improvement around 20K or so.

After that, go in baby steps.....just my $0.02
 

·
Registered
Joined
·
733 Posts
I'm at 17-18.3mpg with my mods at 20,000 miles. Thats what the overhead reads and by hand calulation its right around 17mph. Thats all highway driving for at 75mph with AC on. I too am hoping once my BADP dpf delete kits arrives I will see a few more mpg, especially when towing. I only get 10-11mpg while towing...:(
 

·
Registered
Joined
·
1,554 Posts
Also, try check into the dyna trac front hub conversion. One of my clients reported a 3mpg increase after he switched hubs.

I have the Dynatrac on my 07' 5.9 L and it gets me about 3 mpg better. I got 6" lift w/37" Toyo's. I thought about putting that on my 07' 6.7L but the cost is about $2,200. I would first but that $2,200 into exhaust, chip, filter, DPF delete, etc then go with that. Another thing is you can just disconnect the front drive shaft and that is pretty much the same thing as the Dynatrac kit.
 

·
Registered
Joined
·
1,554 Posts
First of all, please fill out your sig so we know your truck's specs.

Next get her broke in before any mods.

You should see some mpg improvement around 20K or so.

After that, go in baby steps.....just my $0.02
I got 130,000 miles on my 6.7L and I haven't seen ANY MPG improvement since the day I bought it. I get 14.5 highway @ 70mpg and 9.5-11 mpg when I'm towing. I haul everyday around the country and it's all freeway and the MPG are still the same. I did filter & exhaust and still the same. From past experience with my 07' 5.9 L the chip is the best deal for MPG and then the DPF delete since it makes the mpg worse.
 

·
Registered
Joined
·
190 Posts
Keep your foot out of it and drive like a granny. I've started going 100 km/hr and my overhead posts and average of 18.5 mpg on the highway. Plus now I can enjoy the scenery! :popcorn:

Also let her break in like others have said. I didn't start posting better mpg until around 10K. I'm at 12.5 now and stock. Going to keep it that way for a couple more K. Most of all enjoy the new truck!:woot:
 

·
Registered
Joined
·
331 Posts
I also have not noticed a single bit of increase since break in. I am at 44K and still get 15.6 MPG on most tanks. My overhead would stay around 17 most of the time. I just had a new turbo and exhaust(factory) put in yesterday and since then the overhead reads around 18-19 mpg. We will see after I fill up again. I put on about 130 miles a day and most of it is going 80 mph. I am waiting for the 5" TBE to get here but i have the egr delete and edge waiting. I will put the edge on here in a few days after im sure the new DPF and turbo are good and then I will see the real gains. CANT WAIT
 

·
Washington Chapter Vice President
Joined
·
5,059 Posts
With all those mods the most you will see is 18-19 MPG. I get 17 Hand Calculated City driving as mine sits. Some do a little better but i wouldnt expect them to keep multiplying the fuel savings. At some point its about maxed out.
 

·
Registered
Joined
·
179 Posts
I'll take 17 miles a gallon in the city, right now my over head says 15.1 and Its been a little less of a mpg off per fill up. I have a Fass 150 and mp-8 and egr plates sleeping in my truck waiting to be put on I'll post results after the weekend
 
1 - 20 of 56 Posts
Top