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Gas Mileage

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by TheBlazerKid, May 18, 2000.

  1. TheBlazerKid

    TheBlazerKid 1/2 ton status

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    Location:
    Raymond, Washington
    Just curious as to what you guys are getting for gas milage, before my mildly built 454 went tits up I got about 10 city, the engine I am having built now is another 454 but it will be a full on horsepower machine and the guy quoted me about 6.5-7 MPG city.

    Your right I dont understand the jeep thing!?
     
  2. chaka73

    chaka73 1/2 ton status

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    sounds about right, I get about 8-10 on mine with a 350.

    LOVE MY GREEN GIANT!!!
     
  3. bablazer73

    bablazer73 1/2 ton status

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    Location:
    upstate ny
    was always scared to find out. speedo's wrong with the 40's anyways! mobil sends me bills and i pay.

    your right. I don't understand the jeep thing!
     
  4. Blazer79

    Blazer79 1/2 ton status

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    Location:
    Guatemala, Central America
    11MPG Highway, 8MPG City.

    -350 stock engine with 104,000miles
    -Edelbrock Qjet4MV
    -TH350 tranny
    -3.07 gears
    -31" tires

    <font color=black>//////
    What the heck!...Drive it like gas is $0.50/gal!!!
    </font color=black>[​IMG]
     
  5. MA87K5

    MA87K5 1/2 ton status

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    Location:
    Chicopee, Ma 01020
    I get around 12 in the city and 14 on the highway. Maybe more now though.
     
  6. Eagle86K5

    Eagle86K5 1/2 ton status

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    Location:
    Whitehouse, Ohio
    16+ with a stock 305 86





    <font color=green>[​IMG]Eagle86K5[​IMG]<font color=red>
    Masonry...It's a Good Thing
    2B1ASK1
     
  7. CrazeeBush

    CrazeeBush 1/2 ton status

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    Ouch! Something wrong here! I get 12 on a stock 305 '83!!!!!!! Any ideas for me?
     
  8. 84k5

    84k5 1/2 ton status

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    Location:
    Dublin, CA
    I get 12mpg off a 305 too. Always have. Blazers and good milage were never meant to be.

    Brian
     
  9. 7 to 8 MPG
    88 Burb
    stock 350 TBI
    Flowmasters
    4:56's
    38" Swampers


    [​IMG]<font color=red>BigBurb[​IMG]
    <font color=purple>IF YOU'RE SCARED, SAY YOU'RE SCARED !!
     
  10. Boss

    Boss 1/2 ton status Author

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    Location:
    Maryland
    7mpg around town. Don't know about freeway yet, b/c haven't taken it out there long enough.
    GM 350 Crate
    35" BFG's
    TH350
     
  11. MudFrog

    MudFrog 1/2 ton status

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    A big difference is Carb. or Fuel Injected. I know a guy with an '87 350 FI, and he gets 16 in town.
     
  12. mike89

    mike89 Registered Member

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    Los Angeles, CA
    I have a 350 TBI, with an aftermarket exhaust setup (hi flow cat, flowmaster muffler, 3" tubing).
    I am getting 13.5 mpg.
     
  13. Goose

    Goose 1/2 ton status

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    Location:
    South Central Kansas
    7-9mpg in town; 10-12mpg highway

    SBC 350, .030 over, performer cam and intake, holley carb, SM465, NP205, 3.73 diffs, 33" BFGs, 4" lift

    Mud is just thick water, or is it that water is just thin mud?
     
  14. DMK

    DMK 1/2 ton status

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    CINCINNATI, OH
    I get around 13 city, not enough highway yet. My 89 got 15 mpg city. The 13 mpg is from an 87 all stock with new GM motor. The 89 had 100,000 mi comp. chip,and 3in cat back exhaust. Both trucks have 3.42 gears, the 89 had 33 inch tires and current 87 has 32 inch tires.
     
  15. Bone85K5

    Bone85K5 1/2 ton status

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    Location:
    Columbus, Georgia
    '85 170,000 with new 350
    Headers, duals and street tires....
    13 Highway (going 75-85)
    11.5 City

    BBone 85'K5
    Wilderness Roof Rack in the winter, Skyler in the summer...
     
  16. blazer72

    blazer72 1/2 ton status

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    Location:
    KCMO
    72
    400 sb with TPI
    NV4500 5speed
    3.73
    24 to 26 highway
    15 to17 in city (it hard to use 5th in town)
     
  17. BurbinOR

    BurbinOR 3/4 ton status

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    WOW, that is incredible mileage, almost unbelievable. But here's mine -
    79 K5
    406SB W/IROC TPI
    T-350 trans
    3.73 gears
    33" BFG Radial All Terrains
    14 mpg around town WHEN I DRIVE IT mild. When I use the power it gets around 11-12. Sure beats the Q-Jet mileage I used to get - 8 uphill or downhill, no change on the highway or so it seemed.

    '79 - 406 w/IROC TPI - K5#5 - a <font color=orange>sickness[​IMG] <font color=blue>you never get enough of!! [​IMG]
     
  18. CrazeeBush

    CrazeeBush 1/2 ton status

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    Boy, fuel injection must be nice!!! I wish I was seeing those kind of #'s! The mileage would pay for itself after a while. I've heard that TPI is kinda iffy and hard to keep running right. Any comments on that? I was thinking I could rip out a TBI system from a junkyard and I'd be set. Anything to help me out there?
     
  19. Balou

    Balou 1/2 ton status

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    Location:
    back to Germany
    '79 K5
    350 Edelbrock carb. and performer intake
    SM465, NP205, 3.40 diffs, 35", 4" lift

    low: 18 mpg town/highway 60 mph
    high: 8 mpg trail/highway 120 mph

    remember gas is $4.00/gal over here !!!

    Balou
    '79 K5,350,465,205
    [​IMG]"Size DOES matter!!!" said the girl last night [​IMG]
     
  20. BurbinOR

    BurbinOR 3/4 ton status

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    TPI is a simple system, as simple as it gets. REally. Many many GM cars from the factory have TPI, run for years with out tune-ups, etc. NOt sure where you heard they are hard to keep running, but from my experience, no issues. Have mine to refer to, 2 friends with IROC Z-28's, buddy with a cop car Caprice with the TPI, heck, even my daily driver Bonneville 3800 V-6 has TPI. Don't fear it, simple system if you have all the wiring and sensors, certainly no more difficult than a TBI. Plus there are a ton of aftermarket stuff available for it, Arizona Speed and Marine, etc. And if you have a choice, go TPI over TBI.........just my $.02.

    '79 - 406 w/IROC TPI - K5#5 - a <font color=orange>sickness[​IMG] <font color=blue>you never get enough of!! [​IMG]
     

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