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My gas gauge calibration

Discussion in 'Gen 3 Prius Main Forum' started by CaliforniaBear, Nov 6, 2012.

  1. CaliforniaBear

    CaliforniaBear Clearwater Blue Metallic

    Joined:
    Oct 9, 2012
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    Location:
    Northern California
    Vehicle:
    2012 Prius
    Model:
    Plug-in Base
    This was only my 3rd fill-up but it was a convenient way to calibrate the gas gauge. The 1st beep and flash of the bottom bar happened just as I arrived home. The next day I drove 3 miles to the gas station at about 74 mpg so that didn't take much gas. The fill-up was 9.33 gallons so there was about 1.5 gallons left good for at least 50 to 75 miles. The Trip Miles to Go said 22 miles so now I know what the "safety factor" is. In addition it confirms that 1 Bar approximately equals 1 gallon. (I had pretty much the same calibration 1 for 1 at a half tank.)
     
    #1 CaliforniaBear, Nov 6, 2012
  2. jdcollins5

    jdcollins5 Senior Member

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    Aug 30, 2009
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    Location:
    Wilmington, NC
    Vehicle:
    2010 Prius
    Model:
    III
    Yes, I use the 1 bar = 1 gallon approximation. It is not exactly linear but a good approximation. I know that at 1/2 tank that if I divide the miles driven by 5 gallons it comes fairly close to the displayed mpg minus the +5-6% error.
     
    #2 jdcollins5, Nov 6, 2012
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