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How accurate is your dis

Discussion in 'A6/S6/Allroad forum (C5 Chassis)' started by simonwjones, Apr 19, 2007.

  1. simonwjones
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    simonwjones Member

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    [Apr 19, 2007]
    My previous A6, 1.9tdi 130 had no dis and I always worked on a figure of £10 of fuel would do me about 75-80 miles.

    I now have a 2.5 tdi 180Q sport and am getting 100 miles to the same £10 of fuel.

    Strange as I expected the consumption to go down. Based on this I have calcuted that my average consumption is 42 based on 93p per litre.

    My DIS shows an average consumption of 31mpg.

    Now I wasnt expecting it to be accurate but this is miles out.

    How does you DIS compare to you manual calculations?

    Cheers

    Simon
    #1
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  3. Quattravant
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    Quattravant New Member

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    [Apr 19, 2007]
    My previous car (2.5tdi sport avant multitronic) registered about 33-35 mpg average on the DIS (too many stop/start/short journeys), which when I calculated it back from fuel receipts/mileage records, was pretty accurate. I could achieve 40-42 on a long run but I would have to be driving very carefully.

    My new 3.0tdi is not as good (but improving as it loosens up) but the DIS is still fairly accurate (30-33 mpg).

    I'm assuming you are comparing like-with-like, as diesel costs have varied by as much as 10% over the last 18 months or so.
    #2
  4. alanadams
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    alanadams New Member

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    [Apr 19, 2007]
    My 2.5TDI consistently shows 1.5mpg worse than the real figure. The real figure varies between 28mpg and 37 (the latter on cruise control on motorway).
    #3
  5. marsmail
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    marsmail Member

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    [Apr 21, 2007]
    I have 3.0Tdi with 18000 miles. The DIS was regularly 6% or thereabouts optomistic. Since the service about 1 month ago, it seems to be about right, although I have only made one long journey (200+ miles each way) and got about 40 mpg. Normal use gives about 32-33mpg
    #4
  6. fjtwelve
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    fjtwelve Moderator Staff Member Moderator

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    [Apr 22, 2007]
    My figures are almost identical to Mr Adams above, over the last 56000 miles.
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