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Thread: How do you calculate MPG?

  1. #1
    Regular Member Avenged's Avatar
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    Default How do you calculate MPG?

    as per title,
    How do you work it out?


    Cheer's!
    mike

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  3. #3
    Regular Member LJ sxi-nav's Avatar
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    brim tank and reset trip to 0.
    on next fuel fill up brim tank again - note miles travelled and the fuel put in.

    calculation:

    miles travelled / (litres / 4.546)

  4. #4
    Regular Member Ste's Avatar
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    Vehicle : Jaguar XF 3.0D V6

    Trim : Black

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    As above, brim to brim and miles covered...

  5. #5
    Regular Member Avenged's Avatar
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    Cheer's Guy's!

    it's puzzled my head for years hot to wrok it out! lol
    but.. why do we divide it by 4.546??

  6. #6
    Regular Member john_k_sri's Avatar
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    Vehicle : Vectra

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    Year : 2007

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    Default

    Quote Originally Posted by Avenged View Post
    Cheer's Guy's!

    it's puzzled my head for years hot to wrok it out! lol
    but.. why do we divide it by 4.546??
    1 UK gallon = 5.456 litres!

    Or 1 Vectra tank (hatch/saloon) = 13.4 gallons

  7. #7
    Regular Member LJ sxi-nav's Avatar
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    to convert litres to gallons (and do that bit first).

    i.e.

    miles travelled = 600
    fuel entered = 56 litres
    fuel in gallons = 56/4.546 = 12.32 gallons

    600 / 12.32 = 48.7mpg

  8. #8
    Regular Member LJ sxi-nav's Avatar
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    Quote Originally Posted by john_k_sri View Post
    1 UK gallon = 5.456 litres!

    Or 1 Vectra tank (hatch/saloon) = 13.4 gallons
    assuming a typo above. 1 gallon = 4.546 litres

  9. #9
    Regular Member john_k_sri's Avatar
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    Vehicle : Vectra

    Trim : SRI NAV XP

    Engine : 1.9 CDTI 150

    Year : 2007

    Mileage : 72K

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    Quote Originally Posted by LJ sxi-nav View Post
    assuming a typo above. 1 gallon = 4.546 litres
    Yep. Thanks for pointing that out.

  10. #10
    Regular Member amiddleton's Avatar
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    Just done mine and it comes out at 32.24mpg, does this sound right 1.8 SRI 06plate.

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