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Thread: poor gas mileage...13mpg...WHY??????

  1. #1
    Join Date
    Feb 2003
    Location
    Chico, CA
    Posts
    100

    poor gas mileage...13mpg...WHY??????

    i havea 90' SC with 86k. i am getting 13 mpg. can someone please tell me what the poo is going on with my car? is this normal mpg. i do like to play around but i don't redline it all the time and i don't boost much. thanks.

  2. #2
    Join Date
    Jun 2002
    Posts
    288
    I had similar milage until recently i replaced my 02 sensors. After about a tank of gas, now it is what it used to be.

  3. #3
    Join Date
    Jun 2002
    Location
    Illinois
    Posts
    1,744
    Check the O2s, the Air filter, the fuel filter, and the weight on the accelerator.

    Around town & similar short distance driving, this is about normal. If you get around 30 on the highway, then you know its ok. These cars have significantly better highway mileage. I drove 130 miles the other day on a quarter tank, with 2 gallons to spare! But in town, I'm betting on 14 mpgs..

  4. #4
    Join Date
    Apr 2002
    Location
    Albany, NY, USA
    Posts
    999

    14 is still too low....

    A good running sc in a proper state of tune (stock that is) should be getting around 18mpg in city driving. Stick or auto. Around 25mpg on the highway is normal too.

  5. #5
    Join Date
    Jan 2003
    Location
    Victorville, CA
    Posts
    1,379

    AOD avg is about 1mpg less than 5spd.

    I've seen a low of 17 city and high of 29 hyw - low=AOD, HI=5spd.
    I agree with the suggestions.

  6. #6
    Join Date
    Apr 2002
    Location
    Tricking ho's up and down the avenue
    Posts
    3,078
    I get 12-14 But I have a heavy foot and a extra sensitive down shift on the valve body. Plus bigger injectors, ported manifolds, no cats, open exhaust, intake, and lead Nikes.

    Al

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