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Gas Mileage ??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by militaryblazer, Nov 16, 2000.

  1. militaryblazer

    militaryblazer 1/2 ton status

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    My dad Is convinced that any kind of gasoline Blazer can't get any kind of decent mileage so I was just wondering what some of you were getting out there. Also wondering with what size tires and gears. I have a diesel and it gets anywhere from 13 to 17 I think.

    '86 Military Blazer with 4" Lift & 33" Tires
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    My 81 Jimmy, cruisin at about 60-65 MPH steady on the freeway will get about 14-15 MPG (US gallon). I have 35's, 3.73's and the SM465 4 speed. It seems like anything above 60-65 kills my mileage, of course it has the aerodynamics of a barn so that may have something to do with it.[​IMG]

    Rene

    [​IMG]
     
  3. MuleMaster

    MuleMaster 1/2 ton status

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    My '78 does on the road everything between 8 and 14mpg, depending on where and how i drive. The 14 is on the highway at about 60mph and caressing the accelerator. [​IMG]

    <font color=blue>K5 Blazer...because size DOES matter
    http://projectmule.coloradok5.com</font color=blue>
     
  4. tom

    tom 1/2 ton status

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    My '91 seems to be the same as Rene's. I get 14.7 average when cruising at 65 and 12 around town (I generally keep my foot out of it.) It's a 350, 465, 3.73, with 33's. These numbers are corrected for odometer error. Because of tire and gear changes, blazer odometers are ofter inaccurate. If you really want to compare gas mileage, you must use a correction factor for the odometer error.
     
  5. reddog64

    reddog64 1/2 ton status

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    If I keep it at 60 on the freeway and go EASY on the pedal i can hit about 12 MPG but around town having fun.. I'm lucky with 10 MPG... I have 3.73's and the original tires for a few more days...
    I'll let you know the difference with the 35's will make...

    Um... yes officer I know it's too big...
     
  6. reddog64

    reddog64 1/2 ton status

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    Oh... and If I do 75...
    I get about 8 tops... of course running 3000rpm doesnt help I'm sure
    Will do 90 but the hood scares me past that...

    Um... yes officer I know it's too big...
     
  7. wstolar

    wstolar Registered Member

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    Well, it's not a Blazer, but I do want to swap the drivetrain into one. Currently my K30 454,Th400,205,4.11, 38.5's gets 10-11 highway, 7-8 city (mpg per Canadian gallon).

    Walter
     
  8. delta9blazer

    delta9blazer 1/2 ton status

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    Location:
    Northern California, over by 7-11
    my '89 with exhaust, 33's, and a light foot will flirt with 17. i've got just over 300 miles on half a tank this time; i've tried to let everyone pass me on the commute instead of staying on the gas all the time to be in front. i average about 15.


    <font color=purple>delta9blazer</font color=purple>
     
  9. chevy4x4

    chevy4x4 1/2 ton status

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    Whats the differance between a Canadian and a US gallon. I thaught 3.78 liters was 1 gallon.

    [​IMG]
    [​IMG]K5[​IMG]
     
  10. BigJim85

    BigJim85 1/2 ton status

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    I should probably figure out what my Jimmy's mpg is, but it would probably just make me really, really sad. [​IMG] haha

    Call my rig an SUV... And I'll tear your lungs out.
     
  11. rocko

    rocko 1/2 ton status

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    On my old 89 Jimmy w/ tbi, I added Bosch Platinum plugs, accel cap and wires w/ Thrush muffler, I was getting around 18mpg on the highway. That's no joke.. and I wasn't easy on the gas pedal.
    I'm a firm believer on the Bosch Platinums.. !!

    It's better to have it than to need it, than to need it and not have it !!!!
     
  12. 90K5

    90K5 1/2 ton status

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    On my 90 with 3.42s and 33s I get about 8-11 in the city, but i'm kinda heavy on the pedal. I was told by the guy I bought it from that it gets 14 on the highway, but I haven't done enough highway driving to know for sure.

    90K5
     
  13. blazen91

    blazen91 1/2 ton status

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    I get an average of 12.5 mpg with 3.73's, 350, 700r4 and 33's crusing no faster than 65-70. After that, milage bites!

    blazen91
    Protect the land FOR the people,
    NOT from the people.
     
  14. Smitty

    Smitty 1/2 ton status

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    Got a 350, turbo 400 and 4.10 gears. Afraid to check the mpg but my ears pop every time I step on the gas.

    Smitty
     
  15. wstolar

    wstolar Registered Member

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    The Canadian gallon is 4.54 litres compared to the US gallon of 3.78 litres.

    Walter
     
  16. Thunder

    Thunder 3/4 ton status

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    I get 18 mpg at 65mph out of my 89 with TBI also.
    31x10.50s. 350, headers, flowmaster,K&N, accel ign,split fire plugs, 700r4
     
  17. Brian 89KBlazer

    Brian 89KBlazer 1/2 ton status

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    Not to be arguementative but the BRITISH (Imperial) gallon is 4.54 litres and the US gallon is 3.78 litres like wstolar said. We Canadians don't have a Gallon to call our own!! [​IMG][​IMG]

    Brian
    89KBlazer
     
  18. blazer72

    blazer72 1/2 ton status

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    I run 3:73 with 35's and get 22 to 25 mpg on cruse with the A/C on in 5th.

    I understand the jeep thing I drive a BLAZER!!

    Ken
     
  19. delta9blazer

    delta9blazer 1/2 ton status

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    22 to 25?!!?
    are all the streets in your town going downhill???

    <font color=purple>delta9blazer</font color=purple>
     
  20. tom

    tom 1/2 ton status

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    Hey buddy, if you can clone that '72 you'll make a million $. Check that odometer out just to be sure.
     

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