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Thread: fuel economy confirmation

  1. #1
    Regular Member solorider's Avatar
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    Vehicle : Insignia

    Trim : Elite

    Engine : 2.0cdti 160bhp

    Year : 2010

    Mileage : 92274

    Angry fuel economy confirmation

    just filled my car up,377 miles on 55.9 litress of fuel,computer said 32.2 mpg,actual 30.67mpg,this is out of a 1.9 cdti,this has been the fuel economy on the last 3 tank fulls.i think i would have been better off with a petrol engined car.egr valve cleaning made no difference

  2. #2
    Regular Member m8internet's Avatar
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    Sudden drop in temperature may have reduced the volume of diesel which was already in the tank, hence the lower reading
    Also, expect the diesel to consume at least 5% more fuel with the lower ambient temperature and about 15% more at running temperature (surface temperature could be as low as -10'C)

  3. #3
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    Heh heh, that's crap. I'm getting 460 miles to 50 litres.

  4. #4
    Regular Member brifen's Avatar
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    Vehicle : Vauxhall Vectra

    Trim : Elite

    Engine : 1.9 CDTI 150

    Year : 2007

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    Think you check your fuel system out as I would be suspecting a leak?? That is very bad economy.

    Either you have a lead right foot or you've never mentioned the 3 tonne caravan on the back of the car??

    Seriously, any roof racks, top boxes etc...?? I reckon you should be hitting at least 40MPG (normal driving).

    Bri.

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    There's something drastically wrong there then, Ive just done the same check on mine, I too filled to the brim with 55 litres but had covered 499 miles in doing so (120 cdti), my journeys are 9 mile trips each way to work rarely getting into 5th, I drive carefully and stick to the 30 mph speed limits. I would be doing basic checks such as air filter not blocked etc. An emission check would be the next course of action as high emissions are a sign of high consumption and may lead to the problem.

  6. #6
    VIP-Member Johnsdutton's Avatar
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    Vehicle : Signum

    Trim : Elite

    Engine : 3.2 v6

    Year : 2004

    Mileage : 110,000

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    Makes mine look brilliant 350 to a full tank all motorway driving
    3.2 v6 Signum and loving it

    http://www.freewebs.com/johnsdutton/

  7. #7
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    Vehicle : Vectra C Hatch

    Trim : Exclusive Plus Pack

    Engine : 1.9 CDTi Z19DTH

    Year : 57

    Mileage : 100k+

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    May be worth checking over (or checking the right foot ). I get over 600 miles per tank and have averaged 51mpg over 13 months from new, on a 150 CDTi.

  8. #8
    Regular Member gromit's Avatar
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    Quote Originally Posted by Johnsdutton View Post
    Makes mine look brilliant 350 to a full tank all motorway driving
    Mine too. was getting 28mpg before it broke. (3.2 gsi with light right foot)

  9. #9
    Regular Member Penfold101's Avatar
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    Definitely something wrong there dude...

  10. #10
    Regular Member deanos's Avatar
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    Vehicle : Insignia

    Trim : SRi

    Engine : 2.0

    Year : 2011

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    Depends on what you are using the car for , if you just use it for the school run maybe 5 miles a day stuck in traffic it will be quite bad, saying that we get 37mpg going to school and 50+ out on a good run (1.9cdti 120)

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