Mpg and Tank Capacity Measurement

Discussion in 'Gen 2 Prius Main Forum' started by fragglestickcar, Jan 16, 2020.

  1. fragglestickcar

    fragglestickcar Member

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    Disclaimer: I am not liable for injury, death, or damage from the following. Please suggest safer, better ways of measurement.

    Measuring MPG. Fill up. Drive Y miles where Y > 200. Fill up, and record number of gallons filled X. Divide Y by X. Ideally do all this on a single road trip to avoid temperature effects.

    Measuring tank capacity. Keep a full 1-gallon gas can in the car. Drive until red triangle indicates you've run out of fuel. Drive another quarter-mile until you're on fumes (this damages the car, yes). Pull over and fill up with your 1-gallon gas can. Go to gas station and fill up, and record number of gallons X. Tank capacity is X + 1.
     
    #1 fragglestickcar, Jan 16, 2020
  2. dolj

    dolj Senior Member

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    You need to add at least 3 gallons for the car to register that fuel has been added, so you need a spare gas can of 3 gals or more.
     
    #2 dolj, Jan 16, 2020
    nssdiver, srellim234 and SFO like this.
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