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02 duramax fuel economy

This is a discussion on 02 duramax fuel economy within the Duramax Forum forums, part of the General Discussion category; Lookin at a duramax and wondering about the fuel economy. Ive heard stock is about 15 and chipped can be ...

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    Registered User farmkid92's Avatar
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    02 duramax fuel economy


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    Lookin at a duramax and wondering about the fuel economy. Ive heard stock is about 15 and chipped can be about 22 mpgs. Are these right?
    96 Chevy C1500 Standard Cab Short Box, 305 Vortec 5.0, 2wd, 3 in Summit racing lift, 265/75/r15 tires on chrome wheels, custom exhaust

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    Re: 02 duramax fuel economy

    Quote Originally Posted by farmkid92 View Post
    Lookin at a duramax and wondering about the fuel economy. Ive heard stock is about 15 and chipped can be about 22 mpgs. Are these right?
    it all depends ont the mods. my truck with efi live on my big race tune, lift pump, southbend clutch, intake and exhaust gets 19.5 runnin 85mph....o and its lifted 6 inches on 35s
    -2005 Chevy 2500HD ex. cab short bed, zf 6 speed manual trans, efi live, southbend 3600 dual disc clutch, mbrp 4 inch to 5 inch miter cut stacks, lift pump, swiss cheese airbox mod, lifted 6 inches on 35s.

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    Re: 02 duramax fuel economy

    I've been getting about 7.5 last couple tanks. Oh, but that's loaded with 2K of salt, and plowing a foot of snow, and driving in 4x4 100% of the time.

    15-18 empty.

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    Registered User DMAXBubba's Avatar
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    Re: 02 duramax fuel economy

    LB7s are known for "poorer" few economy compared to later years. Both of my old 03's the best i could get through the city was around 16-18 and no more than 20 on the highway. This is with your basic t-back exhaust and respectable tune. My LMM after dumping the DPF, i was averaging around 18 around town/ 22 on the highway with full exhaust, strong tune, 6" and 35s. Now the LBZ i currently have with full exhaust, strong tune, 33s/20s i can get 18-20 all day long through the city and up 23 on the highway.
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    Registered User dozerboy's Avatar
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    Re: 02 duramax fuel economy

    Quote Originally Posted by DMAXBubba View Post
    LB7s are known for "poorer" few economy compared to later years.

    Most say the opposite, but I never had a LB7.

    A tune doesn't mean better MPG stock my truck would easily do 19-21 hwy. With a dedicated Mileage tune I hit 20 more often but have only seen over 21 once. Mileage tunes seem to help city mileage a little more.

    These views expressed on this post are not my own, but rather randomly generated computer gibberish and in no way should be used to judge the author's IQ or mental health.

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    Registered User DMAXBubba's Avatar
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    Re: 02 duramax fuel economy

    Quote Originally Posted by dozerboy View Post
    A tune doesn't mean better MPG..
    Are you refering to your own experience? Every truck ive owned has netted better fuel economy with exhaust and a tune. I picked up 3mpg with a PPE on my LMM. Almost every thread i read on dieselplace where someone has added a tune to their truck, somewhere they always mention better MPGs.
    CURRENT
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    Registered User dozerboy's Avatar
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    Re: 02 duramax fuel economy

    My experience and plenty of others too you can find post about from some of the big tuners if you dig. Just because you read it on the internet doesn't make it true. There are more then enough people on DP that go off the DIC and most don't track there mileage that well or fairly. Of coarse your going to get better if you tune out the DPF.

    These views expressed on this post are not my own, but rather randomly generated computer gibberish and in no way should be used to judge the author's IQ or mental health.

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    Registered User DMAXBubba's Avatar
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    Re: 02 duramax fuel economy

    Quote Originally Posted by dozerboy View Post
    My experience and plenty of others too you can find post about from some of the big tuners if you dig. Just because you read it on the internet doesn't make it true. There are more then enough people on DP that go off the DIC and most don't track there mileage that well or fairly. Of coarse your going to get better if you tune out the DPF.
    I believe you contradicted yourself(bold.) I am going off of personal experience by myself and through buddies of mine. We like to see whos getting the best MPGs with out setups (kinda stupid but passes the time. haha). Also i rarely go by the DIC. I hand calculate every tank and sometimes try different driving techniques to see increase/decrease in mpgs.
    CURRENT
    -06 white DURAMAX/AIRAID/PPE HOT+2/MBRP duals/Bilstein 5100/keys/20x9 BMF novas/33" Cooper STTs
    OLD
    -07.5 white DURAMAX/Stealth2/MBRP duals/CST 6-8"/Bilstein 5100/20x10 lawless 8/35" Mud Grapplers
    -03 white DURAMAX/EDGE/K&N/str8piped/keys/blocks/20x9 Eagle 114/33" IROKS

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    Re: 02 duramax fuel economy

    That number for stock sounds about right to me. Its always better to calculate it yourself than using the DIC I believe.

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    Re: 02 duramax fuel economy

    Mine gets about 13 city and 15 hwy with tuner. LB7.
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    Re: 02 duramax fuel economy

    Quote Originally Posted by justinp95 View Post
    Mine gets about 13 city and 15 hwy with tuner. LB7.
    get a better tuner and you will get better mpgs
    -2005 Chevy 2500HD ex. cab short bed, zf 6 speed manual trans, efi live, southbend 3600 dual disc clutch, mbrp 4 inch to 5 inch miter cut stacks, lift pump, swiss cheese airbox mod, lifted 6 inches on 35s.

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    MidLife Crisis steakman's Avatar
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    Re: 02 duramax fuel economy

    06 lbz.

    MT City ~ 15
    MT Hwy ~ 18-20 depending on speed
    MT Towing 11-12.5 depending on wind direction
    MT sitting still +250 mpg....

    Narrow taller hwy tires are best eg 235/85R16-17 types. Although I'll be soon running Michelin AT/2's285/70R17's. Right now on LT245/75R16 cheapie Snows.
    Wider Profile types with agressive tread will have more rolling resistance.
    winter fuel typically hits me for about 1-1.5mpg less on avg.

    Overall given its approx 7000lbs..I feel it's pretty damned good for this or any comparable truck.

    stk
    Last edited by steakman; 01-24-2010 at 01:16 PM.
    '06 "LBZ" D'Max-Ally CCSB SLE Blanco
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