Chevy and GMC Duramax Diesel Forum banner

fuel mileage

  1. Mileage with 35"s

    Aftermarket Mods.
    Post your mileage with 35' tires......Mine is bone stock.....If mods post them 14 City 17 Highway
  2. MPG Question?

    07.5-10 LMM Duramax Powertrain
    There is a thread kinda close to this but its a little different so I figured Id ask thinkin it might help him as well... I have been looking at a newer body style and was curious what you LMM guys gettin for milage? any increase or decrease with deletes and/or mods? I Have quite a long trip...
  3. 7mpg?

    Towing & Hauling
    Well first I'd like to say I'm a newbie here on the forum, just purchased an '08 C3500 crew cab dually that came with some nice 22.5's on it and 31k miles. I towed my 28' enclosed trailer to Miami this past weekend for the 1st time and had a whopping 7mpg average while doing 70-75mph. To me it...
  4. Mpg decrease

    01-04.5 LB7 Duramax Powertrain
    My 2002 lb7 has the edge juice with attitude installed and had 265/70/16's on the stock alloy wheels. Summer time on stock power level I would get about 13.5 mpg; level 1 gave about 14-14.5; level 4 gave about 15.5. Well I had discoverer stt 265/70/17's put on and now level 4 is giving me an...
  5. better mpg?

    04.5-05 LLY Performance Parts Discussion
    you can see all the mods i have on my truck below, and just last week i added the lbz mp. i have the airaid intake and the edge juice with att, also magnaflow 4" turbo back. last summer before the edge and intake i was getting about 19-23 mpg everywhere then i added the intake and edge and it...
  6. fuel mileage question?

    2007.5 + (GMT 900) Non Powertrain New Body Style
    Hello guy i have a question i have 2010 2500hd crewcab 1000 miles pulled my 31 foot camper to the beach only got about 9 0r 10 miles to the gallon is that normal what can be done to help the mileage thanks greg also the temp flucuacte a lot from like 210 to 225 that may normal i dont know any...
  7. Need hints on mpg's

    07.5-10 LMM Duramax Powertrain
    I haven't calculated it other than looking at my DIC. I am sick and tired of putting $700.00 worth of diesel a month in this truck, hell my payment is only $550.00. What are some good add-ons to get my mileage back up. I have 295's on it which are sucking diesel like a prom night keg. Not really...
  8. Lb7 mpg

    01-04.5 LB7 Performance Parts Discussion
    I have an 04 LB7, i bought the banks sitnger system came with exhaust, tuner, air box and wastegate actuator. Im getting 15 to 16mpg around town not driving crazy or pulling any wieght, what can i do to get better fuel economy? It might all be bs but i have talked to people with the same rig as...
  9. Terrible fuel mileage

    911 Problems Forum
    I have a 06 3500 6.6 duramax with 17,000 miles. At 15,000 the dealer replaced the turbo. Since it gets 11 mpg. It got 19 to 20 before, unloaded. We have taken it back to the dealer and they say nothing is wrong with it. Does anyone have any suggestions on what to look for? I think there in a...
  10. Interesting MPG trial from Quad 2 (LLY)

    Gauges, Electronics and Wiring.
    Although I'm currently doing the 50HP tune trial, here's what I got, and some were totally unexpected. I may be due for a fuel filter change, at which point I'll redo the trials and post them here. The constant mods are PCV reroute and LBZ mouthpiece. This is on a 2004.5 LLY 2500HD 4x4 ext cab...
  11. fuel pressure sensor

    911 Problems Forum
    getting discouraged i am trying to install power puck supposed to be easy??? it plugs into the map sensor and fuel pressure regulator sensor?? i found map sensor can't find fuel pressure sensor :eek: gm says under ac compressor diablo says under intercooler tube please help and pics would be...
  12. MPG problems........

    911 Problems Forum
    I am only getting 11-12.5 mpg around town whether I am pulling my work trailer or driving with out it. I am driving really easy and even this past weekend I took a trip up to the lake and only averaged 12-13 mpg. Anyone have any suggestions on why my mileage is is so poor if I am driving easy...
  13. MPG with ZF6-650

    Transmission Shop
    I haven't been able to find a thread specifically about this, can anyone give me an idea of the mpg increase (or decrease) hwy. with the ZF vs. the Allison?
  14. 2008 Need better milage!!!!! This thing sucks.

    07.5-10 LMM Duramax Powertrain
    I got a 08 chev duramax long box with the large fuel cell 140L I think, this thing stinks for milage at best i'm averaging 650kms to a tank, just put in 130L and got 640km's. I bitch about it everytime the truck goes in for service and they tell me they can't do anything. They told me it gets...
  15. mpg 07 classic

    07.5-10 LMM Duramax Powertrain
    I just got my truck got a tuner putting the 4' magnaflow exhaust on tonight what should i be getting. the tires arnt stock but not large 285/75/16 just wondering what everyone else is getting. I eventually would like to run 35' tires with a 6' lift later also if you have setups like that...
  16. And Another Fuel Mileage Post!

    Alternative Fuels Diesel Additives Lubricants
    I mainly use my 2007 LBZ old body style 2500 to pull my 6000#+ toy hauler. without the trailer i can get 18-19 on the hwy with the K&N air cleaner and using the gray bottle diesel kleen which i am happy with. when i load the toy hauler the mileage drops to 8-9 mpg. i have stock tires and i also...
  17. fuel mileage!?!

    Alternative Fuels Diesel Additives Lubricants
    my 05 duramax lly is absolutely terrible on fuel.. im barely gettin 200 miles to the tank!! motor is bone stock is that normal? and besides a chip what can i do for better fuel mileage? my buddy has a bone stock powerstroke 6.0 and hes gettin almost 400 miles to the tank,and my other buddy with...
  18. Mpg

    Alternative Fuels Diesel Additives Lubricants
    i have a 06 lbz and i was wondering a good way to up my mpgs thanks
  19. LMM mileage with & w/out DPF

    07.5-10 LMM Duramax Powertrain
    I have been tracking my mileage from when I bought the truck. I wanted to see what modifications if any would affect mileage and by how much. I have MBRP exhaust, down pipe back with Quadzilla Stealth 2. So for all that are on the fence about deleting the DPF here are my results. I understand...
  20. Bad MPG

    Alternative Fuels Diesel Additives Lubricants
    So ive noticed recently ive been getting bad mileage, about 15.5 MPG cruisen at 65-70 MPH, did i put in a bad batch of fuel? Anyone got ideas? My 2005 cummins got about 23-24 cruisen at the same speed, it had intake but thats the only real difference..:help