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VW Jetta TDI

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Comments

  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,419
    edited July 2010
    Yep, I've owned 3 diesels and drove them many miles. (two cars, one truck). Can't say I noticed any real difference in decel from a gas car---never really thought about it.

    MODERATOR

  • eliaselias Posts: 1,900
    altair MITS 8800, you are going to be in mpg hog heaven with a VW TDI, no matter what year/model. JSW would be my pick too.

    coasting in neutral does reduce mpg in addition to being a civil violation of the "vehicle code" in most states.
    coasting in gear is the optimal approach as it uses zero fuel and because frictional losses in the engine are not large enough.
    generally, if coasting out of gear were an optimal mpg approach then a couple of thermodynamic laws would be violated. So it's not going to be happening in this universe, except for oddball theoretical cases. Those cases would be the ones where we theorize enormous internal frictional losses within of an engine running downhill using zero fuel.
  • eliaselias Posts: 1,900
    Mr. Shiftright, please don't shift the subject?!
    The driver-touches-go-pedal would be a different subject, a case where a nonzero amount of fuel is used going down the hill.
    The subject at hand was coasting down the hill !
    The definition of coasting is "foot off gas", unless we are making up new words/definitions, which can be fun too. Thusly I hereby refudiate your shifting the subject from the no-touchy-gas-pedal case to the feather-gas-pedal case.
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,419
    I'm kinda done with this, since I don't see it as really relevant to the real world enjoyment of a TDI. It's one of those hypothetical arguments that go nowhere and probably will bore our friends here. I'd rather have you guys talking than me.

    MODERATOR

  • eliaselias Posts: 1,900
    Thanks Mr. Shiftright for guiding me back to TDI-specific topics.

    I may be cross-shopping to replace my 2006 Jetta TDI like so::

    - maxxed 2011 or 2012 VW TDI wagon/golf, no sunroof.
    - 2011 or 2012 2WD regular cab GM duramax pickup
    - 2010 leftover HHR-SS, or 2011/2012 HHR LT

    The pickup costs plenty more but provides so much more functionality, power, torque, and mpg up to 30 mpg @ steady-state 55 mph, and ~25 mpg in normal highway driving. It requires urea-additive, but that's how the increased power/torque/mpg was achieved, so I'm willing to accept that!
  • smallcar1smallcar1 Posts: 76
    I live in Brooklyn, NY and regularly use the heat during winter months. In really cold weather how long does the TDI take to give heat out of the vents? I am used to getting heat within 5 minutes.

    Thanks.
  • eliaselias Posts: 1,900
    edited July 2010
    For the 06 & earlier models with leadfoot drivers, it could be just a minute longer to get heat compared to equivalent gasser.

    Or could be infinitely longer, depending on the traffic/cold conditions ! ! !
    (Slow/stop & go in super cold weather: engine will never warm up.)

    if you want guaranteed/quickest/hottest possible heat, you'll want an inefficient, slow, small gasoline engine in your car...
  • vinchenz61vinchenz61 Posts: 12
    You will have heat in less than5 minutes. I live in Northern Jersey..same climate as Bbrooklyn. I just gave up a V8 suv and my heat and AC were much faster. Up in Vermont in some -10 F it get a little challeging
  • bpeeblesbpeebles Posts: 4,085
    edited July 2010
    Seat-heaters is a MUST HAVE with TDI if you live in cold temps.

    Heck, Even after engine warms up... if I use heater with full-blast fan... the engine will COOL BACK DOWN if I am not on interstate driving. Make no mistake... you will LOSE HEAT in the cabin if you are in stop-n-go traffic as the engine cools off.

    Efficent engine = very litte wasted heat from engine to warm passengers
  • asaasa Posts: 359
    Efficent engine = very litte wasted heat from engine to warm passengers

    That's the bottom line exactly and I think it's fascinating. We live in the southeast and aren't sure if our new '10 JSW TDI has the heater. We think that it might have the heater because we parked one night in an underground garage where it was somewhat cool and when we turned on the heat we thought we felt instant somewhat warm air. We'll know for sure come November ... ;)
  • bpeeblesbpeebles Posts: 4,085
    If I am not mistaken, your 2010 TDI has electric heating elements that assist in warming the air blowing from the vents. That may be what you felt.
  • asaasa Posts: 359
    edited July 2010
    I think you're correct on the supplementary electric heater in the '09+ TDIs. Car & Driver wrote that only Jettas sold in Canada have them, but that's been proven incorrect because many US owners have them standard.
  • sydneybsydneyb Posts: 1
    I am the happy owner of a 2009 tdi sportwagen with about 25000 miles on it. Ever since the car was new I have used less than one pint of (the special) oil in each of the 10,000 mile change intervals. I have owned many different cars in 50+ years of driving, but never one that used this little oil. Any comments?
  • gagricegagrice San DiegoPosts: 28,850
    Welcome to the forum.
    You are experiencing the superior engineering in the VW/Audi diesel engines. If any other auto maker builds a better 4 cylinder engine, I would like to drive it myself to make up my mind. Next to no oil is a big plus over 10,000 miles for sure. For me the drivability of the engine is the top feature. I doubt that any gas 4 cylinder can cruise at 70 MPH up hill and down without shifting to a lower gear racing the engine to get enough torque to pull the long hills.
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,419
    Actually using a little bit of oil is not necessarily a bad thing for an engine. It's certainly not a sign of anything wrong, nor is burning no oil whatsoever a sign of anything particularly meritorious. Some engines, like race engines, are designed a bit loose for their extreme uses, for instance. So adding a teacup now and then is no cause for concern.

    MODERATOR

  • eliaselias Posts: 1,900
    on 400k or 500k of 03,05,06 TDI driving I've only needed to add oil after a day or so of ~100 mph driving, cross-country on I-80, once each westbound & eastbound. Maybe it would not have burned that one quart each way if there'd been a 6th gear like with the 09/010/011 6-speeds.
  • bpeeblesbpeebles Posts: 4,085
    A turbocharged engine will tend to consume minimal engine oil as it seeps into the intake system and gets blown thru the intercooler into the engine. Also, your EGR system will also tend to consume some engine-oil.

    My TDI has over 120,000 miles and consumes NO MEASUREABLE AMOUNT of engine-oil between 10K mile OCI. (Oil Change Interval)

    You will find that low oil-consumption is partually due to the "special" oul which TDIs must have in them. That oil is a highly-engineered lubricant..... which has been proven to be able to go significantly more than 10K mile OCI.
  • alltorquealltorque Posts: 535
    sydneyb, When I took delivery of my Skoda Fabia vRS with the VW 130bhp 1.9 TDi engine I purchased a 1 litre pack of the VW 505.01 oil to use as top up. Nearly 50k miles later I sold the car, (still regret it), and that pack still had most of the original litre left in it. Seems to be pretty normal for these engines. AFAIK, the latest VW CRD engines now run to 20k oil changes..............a testament to engineering and lubes blending.

    I now drive an '06 Volvo S60 with the 185bhp D5 diesel engine and it doesn't use any engine oil between 18k mile services/oil changes. Selling retail lubes is not a good game to get into as forecourt sales, (at least here in Europe), have cratered.

    Long may it continue and long may you enjoy your TDi.
  • mamx4mamx4 Posts: 10
    My Jetta is a 2006 model. This AM when I got to the office, 103663 miles. I change the oil myself every 5000 miles with a filter at each oil change. Absolutely, no oil usage between changes, zero, nada. I think part of it is just diesels really have to be in bad shape with a lot of miles to start using oil. I think the other part is the real jump forward when synthetic technology came out. I use Mobil 1, ESP formula 5W-30.

    Doc MItchell
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,419
    modern diesel engines are so much better engineered than in the old days--on older diesels, like Mercedes from the 80s, your oil would get dirty in a matter of weeks, from blow-by due to the high compression. No more of that!

    MODERATOR

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