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Average mpg readout

Discussion in 'General Automotive' started by coffeesnob, Sep 17, 2013.

  1. Sep 17, 2013 at 12:31 PM
    #1
    coffeesnob

    coffeesnob [OP] Well-Known Member

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    Do you think that those electronic avg mpg fuel readouts are accurate?
     
  2. Sep 17, 2013 at 12:34 PM
    #2
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    Depends on what it is you're using. If you properly calibrate something like an Ultragauge, then yes, it will be accurate.
     
  3. Sep 17, 2013 at 12:34 PM
    #3
    Large

    Large Red

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    On my ecoboost it was fairly accurate, I'd say within 3%, when I had a silverado.. fuck no, I could granny it a whole tank, it would claim 30+ mpg but realistically it was around 14.
     
  4. Sep 18, 2013 at 3:15 AM
    #4
    coffeesnob

    coffeesnob [OP] Well-Known Member

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    I'm using what came with the wifes civic. I guess I will have to compare that thing with what I actually come up with on pen and paper.
     
  5. Sep 18, 2013 at 8:36 AM
    #5
    azreb

    azreb Geezer

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    Let us know what you find out. On other forums I have seen guys brag about what their readouts say, but never how they compare with real life calculations.
     
  6. Sep 18, 2013 at 8:48 AM
    #6
    cstallings

    cstallings Well-Known Member

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    My wife's 4runner has a built in one and it is off by a couple mpgs. It still tells you how you are driving, but it is consistently high. I just subtract a couple mpg and it is usually close.
     
  7. Sep 18, 2013 at 3:09 PM
    #7
    coffeesnob

    coffeesnob [OP] Well-Known Member

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    I did notice one thing when we first got it the mpg was around 36 We got the first 2 oil changes free where we bought it then the MPG's dropped to around 35 / 35.5 We just took it to a local guy who put mobile one in it and it is back up to 36+ I think the dealer screwed us and didn't put in full synthetic even though that is what it is called for in that engine. I'd do it myself but can't fit under it ....was thinking of ramps but I think the drain plug is towards the front.
     
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