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How to work out MPG?

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  • How to work out MPG?

    Can someone tell me once and for all how I can work out MPG?
    Please contact me via PM if you would like to transfer your AllCorsa Gold Membership over to our VIP Membership. It's completely free to do so.

  • #2
    Fill up your tank to the maximum.
    Reset trip meter.
    Drive car for say 100 miles or so
    Refill tank and take a note of how many liters it took to fill it
    Convert liters to UK gallons
    Divide number of miles you done, by gallons of fuel used

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    • #3
      To do it accurately you need to track it over a few full ups, as hardcore says but if you track it in a spreadsheet after 3-10 fill ups your margin for error is greatly reduced.
      Originally posted by Dave
      Originally posted by Stephen Fry
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      • #4
        And 1 UK gallon is equal to 4.546 litres.

        Brimming the tank and recording how many litres went in is the only way to do it accurately, don't rely on what your fuel gauge is telling you.

        So for example:
        You fill up your tank (no need to record anything the first time).
        You then drive x amount of miles (let's say 200).
        You fill up your tank again and see that you've put in x amount of litres of fuel (let's say 30 litres).
        30 litres / 4.546 litres = 6.6 gallons used.
        200 miles / 6.6 gallons = 30.3 miles per gallon.

        Just do this a few times and you'll be able to get a pretty reasonable average.
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        • #5
          I'll give it a crack.
          Please contact me via PM if you would like to transfer your AllCorsa Gold Membership over to our VIP Membership. It's completely free to do so.

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