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1998 Jetta TDI, how to get better economy?

Discussion in 'VW Mk3 Jetta, Passat TDI and other/older diesels' started by BillK, Aug 29, 2007.

  1. BillK

    BillK New Member

    Joined:
    Aug 29, 2007
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    New owner of a 1998 Jetta TDI, getting about 40 mpg. I hear some people say that they get 50 and even 55-60 mpg. Any tips?
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  2. chittychittybangbang

    chittychittybangbang Administrator

    Joined:
    May 23, 2007
    Messages:
    20,927
    Car:
    2006 Jetta TDI
    Location:
    CT
    Drive slower on the highway. Going 65 instead of 75 makes a BIG difference. Only accelerate enough and use enough gas to get you to where you can start coasting to a stop.

    Of course, drive safely first, don't coast from a mile away.
  3. Blackcat

    Blackcat New Member

    Joined:
    Jul 31, 2007
    Messages:
    137
    Take it easy at stoplights. Stoplight racing does a good job of turning gas into brake dust and heat. Keep your tires inflated at a normal pressure. Use the AC on the highway if it's hot, open the windows around town.
  4. darren

    darren New Member

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    Jun 23, 2007
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    371
    The windows up/down doesn't make a huge difference. They did a mythbusters on this where they tested it. I imagine that the speed they did the test on ,the cars, etc., all must have had an effect too.
  5. 6eggs

    6eggs New Member

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    Aug 10, 2007
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    Car:
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    Wyo
    Once you go above about 60 mph, wind resistance increases dramatically. Power to overcome wind resistance at 100 mph is about 8 times wind resistance at 50 mpg. Could be as low as 5 times or as great as 10 times.
  6. chittychittybangbang

    chittychittybangbang Administrator

    Joined:
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    Messages:
    20,927
    Car:
    2006 Jetta TDI
    Location:
    CT
    I saw that mythbusters too and I can't see how it would make NO difference. I would have to see that episode again, though, I forget the details.
  7. BillK

    BillK New Member

    Joined:
    Aug 29, 2007
    Messages:
    78
    I think my car is just different. No real change. A few mpg here and there.

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