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Typical Gas mileage

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by personaltrainer, Nov 9, 2004.

  1. personaltrainer

    personaltrainer 1/2 ton status

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    I've got a '86 Jimmy and I'm getting 8-11 MPG. 4bbl Holly, aluminum intake, cam, flowmasters.
    This sounds about right? /forums/images/graemlins/dunno.gif
    thanks
     
  2. 84k5

    84k5 1/2 ton status

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    I get about the same. The best thing to do is not keep track. /forums/images/graemlins/whistling.gif
     
  3. Poohbair

    Poohbair 1/2 ton status

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    I would help you out, but in the 3 yrs that I have owned my truck it has never had a speedo/odometer that worked. All I can tell you is at 8-11 I think you are getting better than me.
     
  4. mr_blasto

    mr_blasto 1/2 ton status

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    Bone stock on my '72 I get 7-8, even on the freeway with the top off, totally empty. I am trying to figure out solutions to get me in the double digit area... oooh how nice just 10 mpg would be /forums/images/graemlins/woot.gif- I don't ask for much.
     
  5. sickquad

    sickquad 1/2 ton status

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    I'm getting around 16 with overdrive.
     
  6. personaltrainer

    personaltrainer 1/2 ton status

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    Cool. Looks like my mileage is about average then - not a problem. I've been at this old truck game long enough to know it's gonna be bad - just wasn't sure how bad was normal!I'm gonna take the advise and stop keeping track!
     
  7. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    Don't think about it...it only hurts! I go to the gas station about 3 times a month, sometimes more and put in 100 litre(that's all the pump will serve at once) ((we're not allowed to use gallons anymore /forums/images/graemlins/angryfire.gif)) That 100 litres costs me about £85.00 (about $153.00). I just put it on the credit card and don't think about it. If I did worry about it, I'd have to buy a Honda /forums/images/graemlins/yikes.gif And we don't want that do we!! /forums/images/graemlins/rotfl.gif
     
  8. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    [ QUOTE ]
    Bone stock on my '72 I get 7-8, even on the freeway with the top off, totally empty. I am trying to figure out solutions to get me in the double digit area... oooh how nice just 10 mpg would be /forums/images/graemlins/woot.gif- I don't ask for much.

    [/ QUOTE ]

    Man you guys make me feel GREAT. Im lifted kinda big and get way better then that!
     
  9. rescuekrawler

    rescuekrawler Registered Member

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    I only have 33's and get around 100miles to tank but it's not accurate b/c my speedo doesn't work either
     
  10. 79Beast

    79Beast 1/2 ton status

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    Man, you guys have it bad. Maybe it's your driving style. I am lifted about 8" and run 44's with 5.13 gears, a 4 speed, and a 350 that I built. I got right at 10 mpg when I drove it to Tellico. I get 6-8 around town.
     
  11. mr_blasto

    mr_blasto 1/2 ton status

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    [ QUOTE ]
    Bone stock on my '72 I get 7-8, even on the freeway with the top off, totally empty.

    [/ QUOTE ]
    Correction: that was on one tank and i figured it was normal for me. During the last 5,000+ miles my mileage has actually been 8.73 mpg, and that is totally accurate - still bone stock with the top off, 350/th-350, 3.73. A little better /forums/images/graemlins/rolleyes.gif, but not much.

    Any ideas to make my mileage better. I can't afford fuel injection, but i am redoing the entire ignition system with msd stuff, going to electric fans instead of belt driven fans, adding headers and dual exhaust, and hoping to put on a 650 cfm carb with an edelbrock intake. I plan to do a few roadtrips so these will probably pay for themselves before too long. I'm thinking an LS1 swap is in order in the somewhat distant future, so I don't want to go crazy with this motor, and i want things that i can swap eventually. Any Ideas? /forums/images/graemlins/ears.gif

    SORRY 'BOUT THE HI-JACKED POST
     
  12. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    I think a LS1 is a lot more expensive then TPI conversion (not Edlebrock FI). I wouldnt waste money on MSD stuff. Just put in a HEI. OD would help.
     
  13. jjlaughner

    jjlaughner 3/4 ton status

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    12-14MPG in a TBI rig (that was before the lift, 3.08's on 32's)
    I should see in the next month or so what 6" lift, 35's and 4.56's gets /forums/images/graemlins/ignore.gif
     
  14. jekquistk5

    jekquistk5 Weld nekid Premium Member GMOTM Winner

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    6" 35s 3.73's 350tbi stock arround 11.
     
  15. grundy99

    grundy99 1/2 ton status

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    Location:
    Loveland, CO
    6" lift
    35's that weigh 85lbs apiece
    4.10s
    Crate 350 with 4bbl Holley
    14 mpg no OD
    With 36" swampers that 115lbs a piece, 12 mpg
    /forums/images/graemlins/woot.gif /forums/images/graemlins/truck.gif
     
  16. gotmud77

    gotmud77 1/2 ton status

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    As far as i can tell i am getting about 15 or 16 mpg.
    350 edelbrock proflow,700r4,3.73,35"mt's.

    I was out wheelin two weeks ago and only used 7 gallons of gas all day. That was alot of different terrain, mud, rocks,hill climb. I was on and off the throttle alot and was expecting it to use more fuel then it did.

    All in all im very pleased with the pro flow kit.
    [​IMG]
     

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