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Thread: LBZ Fuel Mileage

  1. #81
    Join Date
    Sep 2006
    Location
    Mi.
    Posts
    17

    Default

    14.3 for me, see what summer time brings. My 05 with the same temp. 19.6
    2007 Chevy 2500HD Classic D/A CC/SB White
    Line-x, Nasta Nerf Bars, Bilstein Shocks, Firestone Ride Rite,
    Good/Year Wrangler 265/75/16
    Sunnybrook 5er 30RKFS
    Retired UAW 699

  2. #82
    Join Date
    Sep 2006
    Location
    Skippack PA
    Posts
    25

    Default

    GMC 2500HD Crew 6.5 bed LBZ W/ DiamondBack Cover +/- 300# in bed.
    SE region of PA. Short hops to football practice, staples(beer,wine), project site visits(work out of my Van), family typical runs w/ the 15mile run on the highway to get here and there, mostly Suburban mix type driving. I drive more towards the aggresive side but not like an A hole.
    13.5K miles best average by hand calc. is 15.6/ Straight HW is aroung 18.5
    pulling a light 3500# Boston Whaler.

  3. #83
    Join Date
    Oct 2002
    Location
    USA
    Posts
    1,248

    Default

    We filled up in Thurmont Md. I added some Lucas fuel treatment and also DP cetane boost to the fill up. Then we drove to the Farm show complex in Harrisburg, PA. and back. About 140 miles round trip. 55 to 65 mph. semi Hwy and urban driving. The computer said I averaged 15.9 mpg. The truck only has 1,070 miles on it. I guess I will know how accurate the computer is after I fill up agin and hand calculate.
    0000000

  4. #84
    Join Date
    Oct 2002
    Location
    USA
    Posts
    1,248

    Smile

    Filled up on the way on Hwy 15 and ran 108 miles at semi hwy speeds. 55 and 65 mostly. Went to Harrisburg, Pa and back to Rocky Ridge, Md. Drove 4 miles to town and topped it off 7 gals. We averaged 15.7 mpg. hand calculated. The computer said we averaged 15.8 and said we used 6.9 gals.
    It was pretty acurrate. Only have about 1100 miles on the truck, so it should get better. We were empty not towing and it was 35 to 40 f. outside.
    Just running around town and back country roads the computer say's about 13 mpg.
    0000000

  5. #85

    Default LBZ mileage

    I just got mine Wednesday (crew cab, 4x4, 6 1/2 foot bed), my first tank was 13.7 mpg. So far all of my driving has been city. My previous truck was a 2005 extra cab Z71, it was nice, but I really like the diesel so far.

  6. #86
    Join Date
    Mar 2000
    Location
    Loyal WI US
    Posts
    10,792

    Default

    Has anybody tried condition consistent back to back runs in 5th vs 6th gear?

    I'm wondering if we won't be surprised. 60 mph is my suggested speed for this test...
    Kennedy Diesel-owner
    More than just a salesman-I use and test the products that I sell on a daily basis!
    Superflow Lie Detector in house
    2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
    2005 Chev K3500SRW D/A CC Long LT(SOLD)
    2007 Chev K2500 Classic EC Short LT (Sold)
    2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
    2016 GMC K3500SRW D/A CC short LTZ

    Custom tuning in house using EFI Live tuning software!

  7. #87
    Join Date
    Dec 2006
    Location
    Bainbridge Island, WA
    Posts
    28

    Default First Tank!

    Got the LBZ full up from the dealer. Just filled up for the first time. 16.66mpg. Diesel is now cheaper than even regular gas around here. First time I filled a tank over $75.00 worth. the system just stopped right at $75. I had to reinsert my card and do another coupla gallons! Anyway, for a first tank and mostly city driving I thought that was okay mileage.
    * 07 Classic Duramax Xcab LB in Victory Red! *

  8. #88
    Join Date
    Jul 2006
    Location
    Los Angeles, CA
    Posts
    51

    Default

    Quote Originally Posted by mschuyler
    Got the LBZ full up from the dealer. Just filled up for the first time. 16.66mpg. Diesel is now cheaper than even regular gas around here. First time I filled a tank over $75.00 worth. the system just stopped right at $75. I had to reinsert my card and do another coupla gallons! Anyway, for a first tank and mostly city driving I thought that was okay mileage.
    That's actually pretty damn good considering that it's fresh off the lot and hasn't had a chance to break in yet. Mine didn't get consistent 16 (city)/18 (combined) until i hit nearly 5k miles and had already changed the Oil.

    Diesel is slightly cheaper than 87 RUG here in Los Angeles right now, but about 3 months ago, Gas was near $2.0X and i was still paying $2.55

    As i drove past a bunch of stations today, Cheapest 87RUG - 2.98 (ARCO aka Cheap-Gas) And Diesel from my favorite station was a modest 2.77 (up from 2.68 Last Week)

    The Gas vs Diesel price is sort of a wash, as one can't really predict why all of a sudden prices shoot the way they do.



    Notes:
    • This is not the most conclusive (as far as fuel prices go, i may not have shopped around the best).
    • There are several fill-ups missing, most notably in the beginning and some in the middle, due to lost receipts :-P
    • Note the best tank avg of 18+ mpg (made it back from Vegas on 1/2 tank, getting 22mpg @ 67mph, then kinda wasted the 2nd half of the tank.



    I still like my Diesel though. Don't think i'll go back to a Gasser anytime soon, not in a truck anyways.
    2006 Chevy Silverado 2500HD Crew Cab (Dark Blue Metallic) 4x4 w/ LBZ, 3LT trim package (Leather, XM, ON-star) - Banks Six Gun with PowerPDA... Purchased 6/29/06 - 46000 miles
    2001 GMC Sierra 1500 Banana Yellow Xcab w/ 5.3L, 110k miles riding on 20" chrome rims & 295/55 Goodyear Eagle LS Tires, ~14-16mpg city


  9. #89
    Join Date
    Aug 2006
    Location
    Left Coast
    Posts
    112

    Default

    I have installed the Edge Evolution and have the #3 tune installed. Using the DIC alot, but it seems very close to actual when I compare.

    I used to get 16-18 with mixed driving, now I am getting over 20 with mixed driving

    I do hear a little more rattle, but not much and for this MPG I can live with it.
    2006 GMC D/A C/C S/B, Snug Top Shell, Bed-slider
    33 inch Toyos, 17/8 Pro Comp Wheels, 4 in SS MBRP Exhaust-Turbo back, Evolution Tune, Mag-Hytec on Rear and Trans, Tranco Jr Shift Kit.

  10. #90
    Join Date
    Oct 2006
    Location
    North Pole Alaska
    Posts
    28

    Cool Does it really matter

    Roughly 18 - 20 MPG if I don't put my foot in it, but what the sense, if you can't show off.
    2006 Chevrolet Silverado 2500 HD
    Duramax LBZ, 6-Speed Automatic 4X4
    Edge Juice w/Attitude, S&B Air Intake, MBRP Cool Duals (turbo back)

  11. #91
    Join Date
    Apr 2007
    Location
    Turnersville, NJ
    Posts
    8

    Default

    I've been averaging just over 17 with mine, As of this morning I now have 1011 miles on it, havent taken any long trips yet. mostly city driving and about 100 miles towing my 16,000 trailer/backhoe.
    2007 GMC 3500 Classic SLT 4x4 CC/DRW (LBZ)

    http://i92.photobucket.com/albums/l6/etkeeny/07GMC.jpg

  12. #92
    Join Date
    Dec 2004
    Location
    Waukegan, Il
    Posts
    28

    Default best yet

    My most recent tank gave 19.6, and that was winter blend. Must be breakin in a bit with 7000 miles. I`ll be doing a trip this weekend of 400 miles so hoping to break the 20mpg barrier
    06 GMC Sierra 2500hd D/A-CC/LB 2wd Silver Birch,Linex bed liner,splash guards,Weathertech vent shades,floor liners, GM bug deflector,Draw-tite intella stop brake control,HIR high/low beams.Amsoil BMK-17 dual remote by pass oil filter, funmoto drain valve,ScangaugeII.Isspro A-pillar gauges,Nictane fuel filter kit

  13. #93
    Join Date
    Dec 2006
    Location
    Bainbridge Island, WA
    Posts
    28

    Default First tank

    16.7mpg hand calculated. DIC said 1mpg less. I love this 34 gal tank!
    * 07 Classic Duramax Xcab LB in Victory Red! *

  14. #94
    Join Date
    Dec 2004
    Location
    Waukegan, Il
    Posts
    28

    Smile Yippee

    466 miles on the tank netted 21.47mpg my new best ever! 80 miles was local to work and back. the rest was cruising @ 65mph. When the gauge was 1/2 it showed 410 mile and I was hoping it was getting 24mpg but the gauge is not real true. When I filled, the gauge was 1 mark below 1/2 and took 21.7 gallons.
    06 GMC Sierra 2500hd D/A-CC/LB 2wd Silver Birch,Linex bed liner,splash guards,Weathertech vent shades,floor liners, GM bug deflector,Draw-tite intella stop brake control,HIR high/low beams.Amsoil BMK-17 dual remote by pass oil filter, funmoto drain valve,ScangaugeII.Isspro A-pillar gauges,Nictane fuel filter kit

  15. #95
    Join Date
    Apr 2007
    Location
    Calgary, Alberta
    Posts
    17

    Default

    I have an 06 LBZ CC SB, and have been seeing anywhere from 14mpg (all streets mostly), to about 18 on the highway
    Exactly what I was gettin while it was a stock motor. Now I ain't callin BS on those that say 20mpg + on a stock motor...but yaz got me wonderin for sure..!!

    Now....after mods

    City 16.2 - @ 35 mph or better
    Hwy 20.2 - @ 75 mph

    Truck is MT, stock tires (60 psi front -50 back), and running the Banks at Level 4, driving was done daytime, springtime and on fairly flat terrain.

    To get any better, I think I'll need a sail.

    rgds,

    stk
    06 LBZ CCSB Blanco:
    SS Nerfs, Spray Liner, Banks 6 Gun PDA (Pyro - Pre turbo), AFE TurboBack Exhaust (Quiet like with a nice whistle..!!), AFE Air Filter (stock OEM is best), Sirius on 14/103, FS2500 Oil ByPass, EGR Blocked and "Fingered", Reese Brake controller, Transgo Jr. & BD Deep Ally Pan, Stanadyne Secondary Fuel filtration: FM100, New ISS, All headlight on Mod (dead simple), BioD for an additive, stock 245's - good for mpg.!

    I support the troops, the mission: CANADA In Afganistan

  16. #96
    Join Date
    Dec 2004
    Location
    Denver
    Posts
    13

    Talking

    13.5 with 45 miles on the clock.

    Is it broke in yet?

    .

    .

    .
    '07 LBZ Classic, Leather, Sunroof, no mods yet

    '01 7.3 Lariat, BTS Transmission, Injectors, Turbo, Methanol Injection, and a little more.
    460hp/950tq. <SOLD>

  17. #97
    Join Date
    Jan 2007
    Posts
    299

    Default

    Quote Originally Posted by steak2k1
    To get any better, I think I'll need a sail.

    rgds,

    stk
    You've already got a sail. Those clever marketing guys just call it a tailgate.

    Keep your tailgate up... That works as a great sail. It just doesn't help mileage...
    2007 Silverado, 3500HD, 4X4, CC, Long Bed, SRW, LMM Diesel, Navi, DVD, Roll-N-Lock Cover, ICI Running Boards, CoastalEtech GM Lockpick for DVD/Nav changes in Motion, Back-up Camera...

    2006.5 VW Jetta Special Edition TDI - Blue Graphite - European Spec VW Fact. Nav Radio.

  18. #98
    Join Date
    Feb 2000
    Location
    Maplesville, AL - Home Base
    Posts
    536

    Default

    I towed my 19' boat (4500 pounds boat and trailer) 210 miles Friday night and it got 16.1 mpg at 65 mph, 99% interstate highway calculated. On the return trip without the boat also at 65 mph, 20.3 mpg calculated. I had the a/c on both ways. Ed
    Ed
    KM4STL

    '06 Sierra LBZ 4x4 Crew SB, Titan 52 gallon fuel tank, TTT/Schefenacker Mirrors
    '98 Suburban, 245,000 - sold 7-4-06

  19. #99
    Join Date
    Apr 2007
    Location
    Alberta, Canada
    Posts
    311

    Default

    2006 sierra quad cab, 4x4, best i ever got was 25 mpg highway doing about 110 km/hr
    2011 VW Jetta TDI, pretty well loaded without leather.
    2006 GMC Sierra D-max, 4x4, 4 door, bumper, winch, Espar heater, and the HID lights are a nice touch too.....
    1986 GMC 3500, 454 on propane, 4 speed, 4x4, crew cab dually......the welding truck
    1984 Toyota 4x4 pickup, 4.3 V6, 700R4, Toyota t-case.......transforming into 4x4 cage buggy

  20. #100

    Default 15.7mph

    I have a 2500 HD Crew cab 4 inch lift LBZ I used to get about 9.9 towing(8400lbs Fifth wheel) and about 14.3 not towing on the Highway. I put on a Banks Monster exhaust, and Banks cold air intake, and I used a Superchip programmer. Can you say Rocket. I towed a Aluminum car trailer and a Chevy Caviler 400 miles with the new upgrades with 4100 pounds and 15.7 mpg I could not be happier. (55-65) Climbed the Grapevine in California twice during this trip. I was very reluctant to do anything to my baby. But it seems this was the right choice. Goes very fast if you let it, or make it. I look forward to visiting the pumps again. 500 Hp up from 360hp stock, 740ft lbs torque up from 650, according to the very happy parts man who sold me all this shiney stuff for $1800.00 . I figure I am saving 10.00 per 100 miles driven just while towing mind you and you gotta love that. Now if I can just keep from showing off at every stop light I will be doing very well.
    Red(Red makes it go faster)2007 2500 HD LBZ
    Banks Monster Exhaust, Banks Cold air intake, Super Chip tuner.
    Banks Sticker 50 extra hp and 60 FT.lbs torque from a sticker awesome.
    500 HP and 780 Ftlbs torque.
    1984 CUCV Chevy Blazer 6.5l Retired Army truck
    awesome in its own way.

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