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Economy drop on a TDi, any suggestions?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by Eftwyrd, Jan 29, 2013.

  1. Eftwyrd
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    Eftwyrd Member

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    [Jan 29, 2013]
    Hi all,

    The past few weeks I don't seem to be getting the economy I have done in the past. Taking it easy on the commute to work I used to regularly get 45-50mpg, I'm currently struggling to get 40ish.

    The engine is a 2.0 CR170 TDi (Revo), are there any common problems that could cause a drop in economy?


    Not sure whether to just put it down to colder weather, or the new wheels/suspension. Bit find t hard to believe either would have such a large effect.
    #1
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  3. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Jan 29, 2013]
    Maybe a change in fuel quality, have you used different garage by any chance?
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  4. Eftwyrd
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    Eftwyrd Member

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    [Jan 29, 2013]
    Always use v-power diesel, mostly from the same garage too so would doubt it is that, allegedly fuel filter was changed 10k ago, what is the normal lifespan on one?
    #3
  5. NHN
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    [Jan 29, 2013]
    Check filter if you question this, but maybe try another garage to be sure.
    #4
  6. Rhyso
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    Rhyso Active Member VCDS Map User

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    [Jan 29, 2013]
    Cold weather ususally results in a drop in economy

    if you have fitted new wheels then they could be heavier / larger meaning you are carrying extra weight.

    i fit 16's come the winter months and the difference in economy between them and my 18's is noticeable
    #5
  7. MrLapou
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    MrLapou Well-Known Member

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    [Jan 29, 2013]
    Yes, agree drop in weather temp increases fuel consumption.
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  8. antbuon
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    antbuon New Member

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    [Jan 29, 2013]
    Noticed the same here - defo due to cold weather, lost about 5 -10 miles per gallon but back up to normal today
    #7
  9. Staz
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    Staz is a retronaut Staff Member Moderator VCDS Map User

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    [Jan 29, 2013]
    Might be worth giving Redex a go.
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  10. smurfworth
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    smurfworth Well-Known Member

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    [Jan 29, 2013]
    I thought that's just for petrol
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  11. Boon
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    Boon Active Member VCDS Map User

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    [Jan 29, 2013]
    Save your cash and use 2 stroke oil - I believe Redex contains quite a bit of 2 stroke anyway
    #10
  12. Minstadave
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    Minstadave Member

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    [Jan 29, 2013]
    Check tyre pressures, tyre wear (esp. if you've had suspension work - had a decent alignment done?).
    #11
  13. Alva78
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    Alva78 Member

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    [Jan 29, 2013]
    I too have noticed a drop in fuel consupmtion on my tdi170 and i use millers eco max addative on every fillup.It must be the cold weather.I had the same on my mk4 Golf 150 before this one.Hope it gets warmer soon to allay our fears!!
    #12
  14. Staz
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    Staz is a retronaut Staff Member Moderator VCDS Map User

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    [Jan 30, 2013]
    They do a diesel version toooooo!

    Hmmmm, I think I'd rather trust the proper stuff on my motor, it's not exactly expensive anyway.
    #13

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