EM TuningChris Nott
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  1. #1
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    TDI (140) DSG - Mpg drop?

    Over the last couple of weeks I have noticed how my mpg has gone between 30-40 and sometimes 29, out of half a tank of fuel I am lucky to get 200 miles before reserve tank. Often only getting about 160-180 miles!

    Prior to this I would leave it in sport mode and even after 10 minutes of revving each gear to the max and driving harshly it would still be around 35+ mpg!

    Anyone have any ideas? I have about 6 months left on my warranty so may give Audi a call but would prefer not to!

    Some info:

    - A3 S line TDI 140 DSG
    - Use standard BP diesel
    - Lots of town driving / short journeys

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  3. #2
    Boydie
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    Thats your main problem...short journeys

    Try these simple solutions:

    Disconnect battery for a short time
    Replace deisel filter
    Replace Air filter
    Oil change
    If you know someone with VAGCOM - get them to check your faults and reset the unimportant ones - i found this to increase my mpg for some reason - strange

    I have 175bhp (140pd), 19" wheels and a full sound system and get high 40's most of the time!

  4. #3
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    Not sure about the battery but the diesel/air filter and oil could help. I will look into these, the car is 2 1/2 years old so nothing major (usually) needs replacing!

  5. #4
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    I've never noticed mine get lower than mid 30's in traffic, overall its still averaging 48 on DIS. Weekday driving is a good mix of motorway and stop start - I'd give your friendly local dealer a call and ask them to check it out

  6. #5
    Boydie
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    I am 44mpg overall I think!

  7. #6
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    I'm amazed with mine if I'm honest

    It gets absolutely leathered everywhere it goes, and I mean leathered

    still (according to DIS) averages 48 - I guess one day I should really measure it myself rather than trust DIS

  8. #7
    Boydie
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    I have covered 70k miles though

  9. #8
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    How about actual mileage (on the clock not DIS) from half or a full tank?

  10. #9
    OllyjoyA3's Avatar
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    I am getting 55mpg in mine! awsome!
    A3 S-line 2.0TDI 140bhp


  11. #10
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    Quote Originally Posted by Boydie View Post
    I have covered 70k miles though
    mine's now on 72k, takes its time starting in the morning, think it wants to retire soon

  12. #11
    Gti Jazz Blue's Avatar
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    Be worth a trip to the dealers as it is still under warranty as there is something amiss.

    For example I had the coolant temp sensor go on mine and it didnlt flag any errors on the dash.

    The Engine ECU knew there was a problem though.

    Paul
    2011 (MY12) Skoda Octavia II FL VRS Manual Hatch 2.0Tsi in Race Blue.
    Gone not forgotten -
    2005 Black A3 (8P1) S-Line 2.0TDi DSG. Eibach Pro Springs, Koni FSD shocks and a few bling bits inside.
    Revo 99 GTi Turbo, too much to list mod wise.
    92 Golf Gti Mark 2 16V.

    VCDS HEX-USB+CAN

  13. #12
    Amchlolor's Avatar
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    Quote Originally Posted by Boydie View Post
    Thats your main problem...short journeys
    My A3 sometimes only did 7 miles a day (3.5 miles commute).
    Combination of sitting in traffic, then revving the paps off it on a short stretch of country road.
    I still got around 40mpg(ish).
    '02 to '05 - Black Audi A4 1.9tdi sport
    '05 to '08 - Akoya Silver A3 sportback S-line DSG
    '08 to ? - Black Alpina D3

  14. #13
    sprout99's Avatar
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    Quote Originally Posted by OllyjoyA3 View Post
    I am getting 55mpg in mine! awsome!

    I DON'T BELIEVE YOU !!!


    don't believe the DIS - it's full of ****

    We get 45 ish if we drive like miss daisy and most of that is on dual carriage way
    2004 AUDI A3 S-LINE DSG TDi
    MAURITIUS BLUE
    2005 BMW 120d M Sport 163+
    BLACK SAPPHIRE

  15. #14
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    I dislike going to the dealers for anything, they always damage something

    Even with all my short journeys it never went to low 30/28-29 mpg.

    Tomorrow I will check everything is normal ie coolant, oil, etc didn't get a chance today! Then I will take it on a stretch to see if it improves, if not off I go to the dealer

    Thanks for info so far! also my DIS has been very accurate, I also track it by looking at the actual mileage and that has become poor too!
    Last edited by sibby; 5th June 2008 at 23:44.

  16. #15
    sprout99's Avatar
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    If we drive ours with a random amount of thrashing it will do 40mpg

    If we drive it nice all week we get 45mpg.

    VAGS always were top at mpg until the 2.0TDI came along .

    The other 1.9 130PD A3 we have returns 50mpg with lots of thrashing.
    The older car is not Euro 4 compliant and has 95k on her.
    2004 AUDI A3 S-LINE DSG TDi
    MAURITIUS BLUE
    2005 BMW 120d M Sport 163+
    BLACK SAPPHIRE

  17. #16
    nhowroyd's Avatar
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    On a similar theme.....

    I am expecting delivery of my A3 Sportback SE 2.0 (140) TDI S-Tronic.....

    How many miles should I expect from a tank and do I need to run it in or can a cane the backside off it from the get go..
    Nick

    July 08 - A3 Sportback SE 2.0 TDI 140 S-Tronic - Deep Sea Blue - Ipod - Aluminium inserts - TomTom Proclip mount - THB Bury Car Kit - DIS

  18. #17
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    cane it, I did and mine's (engine wise) been fine

  19. #18
    nhowroyd's Avatar
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    What mileage do you get from a tank.......
    Nick

    July 08 - A3 Sportback SE 2.0 TDI 140 S-Tronic - Deep Sea Blue - Ipod - Aluminium inserts - TomTom Proclip mount - THB Bury Car Kit - DIS

  20. #19
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    according to DIS it reckons 550 ish, it actually manages something nearer to 450, unless the wife drives then it could possibly make it to the moon and back on a tank

 

 

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