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Thread: Average MPG Reading - WHY?????

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    Default Average MPG Reading - WHY?????

    Can somebody tell me whay the average mpg reading on the vectra never changes?
    On all my previous cars (VW, Ford etc) the average mpg changed as I drove yet in my vectra it just stays constant.
    If I do a reset the figure changes as I drive but after a day or so it just stays on a figure (currently 47.0).

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    Regular Member PORKBALLS29's Avatar
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    24.2 on mine Lol.

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    Regular Member adamtaylor's Avatar
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    I have noticed this too, ours sits at 34mpg all of the time and yet my7 golf changes often between 35 and 55mpg (Depending how many cars are on the road!!)

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    Regular Member Craig1985's Avatar
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    Because it's the average, once my bc has about 1500 miles clocked it hardly ever changes once it settles down?
    I think vw reset everytime the car is restarted so getting an average just for that journey as where the vec keeps records of old trips?

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    Regular Member adamtaylor's Avatar
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    Ah yeh I guess that makes sense!! My Golf has an average for journey and a long term average seperately for total travelled without a reset, something the Vectra lacks really!

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    That seems pretty pointless to me, why do we need to know the average mpg for all of our journeys! I am only interested in my current journey..

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    Regular Member Craig1985's Avatar
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    That's why you have bc1 and bc2, I use bc2 as my combined average after each fuel refill and bc1 when ever I want to average a single trip

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    Regular Member adamtaylor's Avatar
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    You will have to reset the distance travelled on BC for each journey then!

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    Regular Member adamtaylor's Avatar
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    I dont have BC2 on mine......

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    Regular Member shb1988's Avatar
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    Vehicle : vectra

    Trim : gsi

    Engine : 3.2 v6

    Year : 2004

    Mileage : 69,000

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    The one that constantly changes is often referred to as the instant consumption...? That's why it changes all the time where as the average consumption just works out how much you have got to the gallon since you last reset it

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