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  1. #1
    Senior Member Wallythacker's Avatar
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    Quote Originally Posted by MetroMPG View Post
    Short fill? You'll know for sure next time.

    Or... did you have a massive tailwind on that trip?
    nope, current fuel use indicates a full fill. It was a calm day
    Zero, 2014 ES Plus 5MT, written off but not forgotten.
    Zero II, 2014 SE, 5MT, climate She's HOME now!
    Shelby AKA "Cute", 2017 ES 5MT, A/C.

    Mirage owners look at the world differently than everyone else, but in a better way
    We're driving the Beetle of the 21st century, the greatest small car now available!

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        click to view fuel log View my fuel log 2017 Mirage ES PLus 1.2 manual: 39.0 mpg (US) ... 16.6 km/L ... 6.0 L/100 km ... 46.8 mpg (Imp)


  2. #2
    Senior Member sunbeam's Avatar
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    I only measure the fuel economy using fill to fill receipts ie. Fill tank, drive a distance, fill again.

    The cars measurements are all subject to error, this to me is the most accurate way.

    It could be random variance, it could be measurement error, it could be non-ethanol gas vs ethanol gas (up to 15% difference in fuel economy).

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