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mpg what to expect on stock 74

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by gotime, Sep 17, 2002.

  1. gotime

    gotime Newbie

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    What can I expect for mpg on a tock 74 4x4 blazer? Thanks.
     
  2. zakk

    zakk 1/2 ton status

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    stock with what? please fill out your profile.

    also, if you are looking for a commuter, the K5 isn't it. It might be stock now, but THE BUG has been going around, and you will get bitten too.

    with a SBC 4.10 gears and 39.5" tires, i get about 9-10 MPG.

    Greg72 have a BBC 4.10's and 38.5" tires and gets 8 MPG

    Other with 700 trannies get 12-14 MPG.

    So with 35" tires, 4.10's and other stuff, 10 MPG is safe.
     
  3. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Before I fixed my non operational 4bbl I was getting a 11mpg /forums/images/icons/smile.gif Doubt I will ever see that again. I'll trade the mpg for being able to maintain speed on hills and not having 1970 beetles passing me.
     
  4. Blue85

    Blue85 Troll Premium Member

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    A blazer can get 23mpg on the highway.

    But not using spark plugs. /forums/images/icons/grin.gif
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

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    watch me /forums/images/icons/smile.gif

    (Yer gonna have to wait awhile though)
     
  6. TopOff

    TopOff 1/2 ton status

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    I am getting 15MPG (if I keep it ~65 mph).
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    In my light truck (relatively, 5000lbs) I avg. 10-13 in the city. 18MPG is my absolute highest, but I need a lot of flat ground and no traffic to reach that. : ) 10-13 is what I end up with EVERY fill up though, since I do mainly stop and go city driving when I have to drive it.

    Combo is 350, q-jet, 4 spd manual, NP205, 3.42 10 bolts, and 33" tires.
     
  8. Panther

    Panther 1/2 ton status

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    Zero MPG /forums/images/icons/tongue.gif

    Combo is 350, q-jet, non-functioning TH350, 203, 33" tires

    I never got more than 16 MPG with my 90 and that was bone stock with OD (700R4) and smog equipment. With the 74, I plan to get about 10-12.
     
  9. StiffRide81

    StiffRide81 Registered Member

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    If you are worried about MPG.. you should not be getting this truck... HELL, you should not even be off-roading at all either... you want good gas mileage.. go buy a bug or something. /forums/images/icons/tongue.gif If you want to have fun and drive a beast.. then expect to consume insane amounts of delicious premium gasoline /forums/images/icons/grin.gif
     
  10. Blazer1970

    Blazer1970 1/2 ton status

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    A well tuned '74 with a properly functioning Q-Jet (not likely) should get about 15 mpg.
     
  11. shane74

    shane74 1/2 ton status

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    I have a '74 w/ sb350, th350, np203 (still full-time), and 3:73 gears. I get about 7-10 mpg in town and about 12-15 mpg on the freeway with my 33x12.50's. I get about 5-7 mpg in town and 10-12 mpg with my 38x12.50's. But my 350 is pretty tired. I am doing the big block swap soon. I should get better milage all the way around with a moderately built 454. /forums/images/icons/laugh.gif
     
  12. gotime

    gotime Newbie

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    thanks all, as long as I can clear 10mpg I'll be happy.
     

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