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Thread: LBZ Fuel Mileage

  1. #1
    Join Date
    Jan 2005
    Location
    NorthEast
    Posts
    37

    Default LBZ Fuel Mileage

    I was wondering what you guys are seeing for fuel mileage with the new LBZ. I'm thinking about buying one.
    Any problems with them?
    2006 Chevy 2500 HD Ext. Cab SB, LLY w/ Alli 6 speed

  2. #2
    Join Date
    Sep 2000
    Location
    Idaho Falls, Id USA
    Posts
    132

    Default

    I am lifted with 35's on and I am getting 13.5 to 15.5 around town with some mixed driving, on winter blend. I only have about 4000 miles on this truck. It is getting a little better as time goes on.
    2001 x cab dark gray sold @50000 NO PROBLEMS<br />2003 D/A CC Marine Mettalic Blue sold @68000 NO PROBLEMS<br />2006 Stealth Gray slt cc LBZ 6inch pro comp lift 315 BFG muds

  3. #3
    Join Date
    Feb 2000
    Location
    Houston, Texas, USA
    Posts
    251

    Default

    My truck is showroom floor stock. I have 1200 miles now. I am seeing 17.5 city, about 20 highway. Haven't gone on a trip yet to get a good look at highway milage. Like others say, it will get a little better once she brakes in.
    David Proske #418
    '06 CHEVY LBZ 2500HD CC LWB
    '03 GMC 2500HD D/A *sold* :-(
    '94 K2500HD W/GV OD

  4. #4
    Join Date
    Sep 2000
    Location
    Idaho Falls, Id USA
    Posts
    132

    Default

    Just got back from a dirt biking trip. pulling a 6 x 12 enclosed with 4 bikes, gear, tool chest, etc. probably around 3000 pounds. Got an average of 12.2 going 82 mph. This is adjusted for odometer error. Not as good as I had hoped but we were going fast in a lifted pickup. The other truck was an lb7 with the almost identical load, he got just over 13 but he was going around 85 to 86 mph.
    2001 x cab dark gray sold @50000 NO PROBLEMS<br />2003 D/A CC Marine Mettalic Blue sold @68000 NO PROBLEMS<br />2006 Stealth Gray slt cc LBZ 6inch pro comp lift 315 BFG muds

  5. #5
    Join Date
    Jan 2005
    Location
    OH
    Posts
    19

    Default

    My LBZ mpgs are slowly improving. With around 1400 miles on it, I got 17.92 hand calc'ed on a 300+ mile trip into Michigan last Friday running 72-77 mph. No problems whatsoever with mine so far & I like it better than my old LB7.
    '06 GMC LBZ/A CC/SB 4x4

  6. #6
    Join Date
    Nov 2000
    Location
    foxboro,ma.
    Posts
    908

    Default

    5000 mile on it now ... average is just 16.6 mpg on winter blend fuel and its a crew cab 4x4 with a cap , 70 % high way driveing and speeds around 80 mph. It seams like its getting about 1 mpg better then my lly. I will say it has no problem running at 80 where the lly seamed to streach a bit to get to 80. The 2006 allison is the best tuned trans since they started using them in 2001!
    93 c-2500 6.5td,96 6.5td x cab,01 GMC lb7 Xcab ,2004 lly crew cab ,2006 lbz crew cab,honda CBR1100xx,2003 polaris prox 700 , 2001 31' holiday rambler 10K lbs house on wheels!

  7. #7
    Join Date
    Feb 2002
    Location
    Sacramento, CA, USA
    Posts
    162

    Default

    A friend with a new LBZ came up for a visit from Southern CA couple days ago. He just sent me a note to tell me he got 20 mpg on the return trip cruising at 75. I made the same trip in my LB7 a few weeks ago and got 19.26 on the same route at the same speed. I guess that 6th gear helps.

    TC
    \'03 Fire Red GMC 2500HD D/A Ex Cab SB 4x4, Leer shell, Husky flaps, Oilguard, Juice, Mufflerectomy, Cat fuel filter, Titan V, Equal-i-zer, Arctic Fox 30U

  8. #8
    Join Date
    Mar 2006
    Posts
    23

    Default

    Quote Originally Posted by Tsckey
    A friend with a new LBZ came up for a visit from Southern CA couple days ago. He just sent me a note to tell me he got 20 mpg on the return trip cruising at 75. I made the same trip in my LB7 a few weeks ago and got 19.26 on the same route at the same speed. I guess that 6th gear helps.

    TC
    Yes, he did! Now he's a member here! The 0.74 extra mpg was sure expensive Tsckey!

  9. #9
    Join Date
    Feb 2002
    Location
    Sacramento, CA, USA
    Posts
    162

    Default

    Well! We here it from the man himself! Welcome aboard amigo.

    TC
    \'03 Fire Red GMC 2500HD D/A Ex Cab SB 4x4, Leer shell, Husky flaps, Oilguard, Juice, Mufflerectomy, Cat fuel filter, Titan V, Equal-i-zer, Arctic Fox 30U

  10. #10
    Join Date
    Dec 2005
    Location
    Klamath falls/keno Oregon
    Posts
    466

    Talking

    i only have 5500 miles on mine. and i have a ladder rack on with ladders hanging in the wind, 3 tool boxes bolted to the sides and a full load of freon and heavy tools and supplys..my last tank got me 17.0 mph..i travel at 75mph when on the highway..Oh yea im happier than a pig in $hit...my ole dually 454 got 6mph..
    06 1ton 4X4 duramax/6speed ext.cab WT
    Hummer wheels :^)
    dual lift pump
    Banks air intake

  11. #11
    Join Date
    Dec 2004
    Location
    Up state NY
    Posts
    10

    Thumbs up I cant wait

    I only have 350 miles on my LBZ and I am getting 13.6, it is a CC 3500 Duelly so I cant complain. But with all the high numbers I am seeing from the other posters I cant wait to see what kind of mpg I am going to get.
    Tony
    2006 4X4 Silverado 6.6l LBZ Crew Cab 3500 Crew Cab Duelly, 17000 miles in 3 months, Black XM, and Siruis Sat Radio (Howard Stern & Bubba rock) Plus Playboy lolol

    (sold my) 2001 4X4 Silverado 6.6l Crew Cab Short Box, Juiced with 115000 thousand miles, High Idle sw,

    1999 HD Softail Custom, 2004 Skidoo 800-HO RAVE,(sold) 86 Pontiac Fiero 18,000 miles in showroom condition for sale if interested,(sold) 2003 Honda HyBrid to save on the price of fuel 48 MPG

  12. #12
    Join Date
    Feb 2003
    Location
    Texas
    Posts
    23

    Default

    I have a little over 800 miles and my first tank by computer was 14.9mpg and by calculator it was 15.5, second tank 15.2 by computer and 15.6 by calculator.
    2006 GMC, 3500, Duramax , Allison, Stealth Grey, Westin bars, Gunslinger custom wheels, diamond plate tool box, 16K Reese fifth wheel hitch, GPS, Deep tint, XM, Doran Pressure Pro

  13. #13
    Join Date
    Dec 2004
    Location
    Montgomery, TX
    Posts
    8

    Default

    I have 4000 miles with a stock CC dually. It gets better every tankful. My '04 seemed to get just a little bit better (identical truck) but this sure cruises better at high speed. Love the 6th gear. By the way, figure the milage by hand, it actually comes out better than the computer. The computer figures it burned 30 - 32 gallons for an approximate milage of 16 but it only will take 28 - 30 for a milage closer to 17 - 18 mpg. The computer figures it burned more than it actually did.

  14. #14
    Join Date
    Jan 2005
    Location
    ohio
    Posts
    34

    Smile lbz mileage

    hey guys i got a bone stock lbz (I LOVE IT!!!) im getting about 17
    mpg' s city and about 20-21 highway, i just put my goose neck hitch and brake box in it this last weekend ( a b&w turnover ball and a techonisha pilot)
    a lot of people say it takes years to get your oney back for the cost of a diesel but in my opioin it is wirth it whenever i need the power to poull a hill with a 4000# tractor on the flat bed, try to do that with a 6.o then tell me how long you think it will take it to be worth it!!

  15. #15

    Default

    My mileage is starting to go up a little. About 16 mpg on the highway according to the computer, about 17 when I calculate it. I've got about 5,500 miles on it so far, I put a set of 295 BFG AT's on it right after I bought it. I only ran two tanks of fuel before I swapped the tires and can't really see that it made a difference in my mileage.

    Crew Cab 4x4 SLT - DMAX - Love it.

  16. #16
    Join Date
    Mar 2000
    Location
    bayville, new jersey, USA
    Posts
    280

    Default

    1st tank was showing 17.1 as long as i kept her at 70 mph. 75 would drop to 16....

    hopefully once broken in, 17 will be norm at 75-80
    '12 gmc sierra 2500 dmax slt carbon black.
    '12 s350 diesel mb
    '10 mazda 6i, for sale
    '77 450sl benz, in family since new, sold, still in jersey thou
    '91 350sdl benz, 3.5l diesel, 28 mpg
    '90 560sel benz

  17. #17
    Join Date
    Apr 2001
    Location
    Ten Mile, TN
    Posts
    180

    Default Mpg

    Well, my truck just hit 1000 miles. I have been getting 14 or so combined averge. However on the interstate at 75 for a full tanK it was only 13.7 mpg. I hope it goes up at the others did when they broke in.

    I hope when I get back from this hitch on the rig to hook a 12000 pound load to it and put some miles on it that way.
    2006 GMC SLT K3500 Crew Cab 4X4 Dually, Duramax, Allison.
    100th ANNIVERSARY Harley-Davidson FLSTFI with custom Black with blue airbrushed \"Real Fire\" paint set.

    Previous Duramax trucks:
    2005 GMC SLT K3500 Crew Cab 4x4 Dually, Duramax/allison 25210 miles at trade
    2001 Chevy LT C3500 Crew Cab dually, Duramax allison 132,210 miles at trade

  18. #18
    Join Date
    May 2006
    Location
    Bryant Pond
    Posts
    1

    Default

    1st post here. About 2k miles in the first month. Overall average so far is 15.2. Driving is a even mix of rural driving nice and 75-90mph highway. Last tank was 15.6 with a higher percentage of 80-90mph highway. I put 285 tires on and the mileage is with calculated with corrected odometer based on GPS, so fairly accurate.

    So far very happy. First GM product in a while, replaces a 2000 f350 PSD which was a great truck also. Getting 1-2mpg better than the PSD and that is with a tight engine still hope to see another 1mpg when I get closer to 10k mileage.

    don

  19. #19
    Join Date
    Sep 2001
    Location
    greenwich nj, usa
    Posts
    100

    Default

    I have a 2006 LBZ in a GMC, crew cab, shortbed, 4wd, Allision trans. Bought new in April 2006. I have recored the following mileage:
    Tank #1, actual 18.6, DIC says 16.9
    Tank #2, actual 19.6, DIC says 17.5
    Tank #3, actual 19.8, DIC says 17.6
    Tank #4, actual 18.9, DIC says 17.3
    Tank #5, actual 18.9, DIC says 17.4

    All driving is combination city and highway with AC on, highway speed 65 mph. Truck is 100% stock. Using Stanadyne Performance additive in every tank, 6 oz.

    I have asked my Dealer if the DIC is always inaccurate, he says they have found that it varies in every vehicle, some are correct, some are low and some are high on the mileage calculation. I have asked them to contact GM about it. I would think that there must be a calibration adjustment somewhere. If not then the DIC info is of little value in my opinion.

    Your comments,
    JimO

  20. #20

    Default

    I have 3400 ish miles on my GMC 2500hd cc allison 4wd.

    I have been getting around 15 mpg combined. I havent been using any addatives though. that might help my mpg in the future.
    06 GMC LBZ - stock for now

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