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VW Jetta TDI

3707 messages,  Last post on Nov 30, 2009 at 6:14 PM

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What is this discussion about? Volkswagen Jetta, Biodiesel, Diesel, Sedan


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#2465 of 3707
Re: Considering a TDI for their high fuel economy [bottgers] by driverbern
Oct 17, 2008 (6:34 am)
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Replying to: bottgers (Oct 17, 2008 5:56 am)

I had the same questions as you. I bought my 2006 TDI (manual) new in July of '07 and it now has 65,000 miles on it. I've had no problems with it. I put on alot of highway miles and consistently average 45 to 50 mpg. There is no issue with starting in cold weather. The biggest drawback is defrosting since letting it sit at idle will not produce heat and that means you're going to drive the first 5 minutes with a windshield that is less than clear. Even after scraping off the frost/ice/snow it will glaze over until heat is produced.
I would say that if your main concern is cost of ownership the Toyota would be the way to go. If you factor in the "fun to drive" issue you'll like the TDI.
#2466 of 3707
Re: Considering a TDI for their high fuel economy [driverbern] by altair4
Oct 17, 2008 (7:11 am)
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Replying to: driverbern (Oct 17, 2008 6:34 am)

I have a Passat 1.8T that is outside 24/7. In the winter, I'm not one for idling the engine to warm up the car - it's always "get in, turn the key and go." Even in the dead of winter here in SW Pennsylvania, I'll begin to get heat within a few miles. So the TDI is similar, then? My Passat throws a lot of heat once underway. Does the TDI perform sufficeintly, or are you dependent on the heated seats, even after the car hits operating temps?
#2467 of 3707
Re: Considering a TDI for their high fuel economy [altair4] by cosmo
Oct 17, 2008 (7:32 am)
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Replying to: altair4 (Oct 17, 2008 7:11 am)

We have a 04 Passat TDI and a 06 Jetta TDI. On 10F to -10F mornings both need about five miles of driving to warm up enough to get comfortable heat from the heaters. However, the Jetta has electric elements in the heating system which usually provide enough warmer air to the defroster to keep the windshield clear. When the outside temp is above 10F the Jetta's heater will begin providing heat from the get-go. Once the engines reach normal operating temperature there is no problem with getting enough heat into the cabin.
#2468 of 3707
Re: Considering a TDI for their high fuel economy [altair4] by jim314
Oct 17, 2008 (9:20 am)
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Replying to: altair4 (Oct 17, 2008 7:11 am)

Diesels are more efficient than gasoline engines; diesels have a lower specific fuel consumption (BSFC in weight of fuel consumed per hour, per unit of engine power developed ) than gasoline engines.
 
The waste heat output of a diesel engine is much less than the waste heat output of a conventional gasoline engine of the same power, especially at idle. In fact, some diesels are not supposed to be run indefinitely at normal idle, even in warm weather. The engine temp will drift down and down to a level at which excess engine wear occurs. The diesel engined Mercedes Sprinter vans have a so called "high idle" option so that the engine can be run above normal idle for extended periods while stopped in heavy traffic or holding passengers while stopped. This high idle keeps the engine temp in the correct operating range at the expense of higher fuel consumption.
 
The waste heat from the engine is what is used to heat the passenger compartment. So diesels will not heat the passenger compartment as rapidly as a gasser.
#2469 of 3707
Re: Considering a TDI for their high fuel economy [cosmo] by altair4
Oct 17, 2008 (10:00 am)
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Replying to: cosmo (Oct 17, 2008 7:32 am)

Thanks for that tidbit about the electric elements in the heating system. I did not know that.
#2470 of 3707
Re: TDI makes the News [olive4] by noa1
Oct 17, 2008 (10:36 am)
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Replying to: olive4 (Oct 17, 2008 6:19 am)

maybe you're not familiar with this technology, VW been producing diesel engines for generations, the majority of Europeans drive diesel cars.
you're not getting a car fresh out of the drawing table. In case you wonder diesel is readily available i believe 42% of stations carry diesel in the USA specially stations along the freeways, just make sure to keep paper towels in your trunk the truck drivers are very careless when handling pump nousals, they're mostly slimy, but this car is well worth it. if you end up buying the car know you're not gonna be driving just another basic car as this cars come with lots of features as standard equipment. Good luck.
#2471 of 3707
Re: TDI makes the News [noa1] by ruking1
Oct 17, 2008 (11:04 am)
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Replying to: noa1 (Oct 17, 2008 10:36 am)

I am encouraged (but a tad disappointed) the percentage of fuel stations is 42%. In 03 when I bought the TDI, it was pegged 25% aka 1 in 4 fuel stations. At the time I had absolutely NO issues getting fuel. Being as how the passenger diesel fleet has contracted 33% from less than 3% to 2%, my swag is new TDI owners will have even less issues.
#2472 of 3707
Re: Considering a TDI for their high fuel economy [bottgers] by bpeebles
Oct 17, 2008 (1:42 pm)
Reply

Replying to: bottgers (Oct 17, 2008 5:56 am)

"What was the first year of the high MPG TDI? " At least as far back as 1981... they were built in Pennsylvania (New Stanton) I have some relatives who used to work there.
 
"How reliable are they" Using the design life-expectancy of the engine (given in hours) and some math (assuming 50MPH average speed)....the TDI engine is rated for at least 300,000 miles. Keep in mind this same basic engine is used in marine applications to move boats over the ocean.
 
"How hard are they to start in cold weather?" Not hard at all... STARTING is not an issue at all. (My TDI starts just fine at -15F)
 
"how long does the engine have to run before they start producing heat from the heater?" Depends on many variables. On a cold morning, (-15F) it may take 10-20 miles of driving. HOWEVER, if you turn the heat all the way up... the engine will NEVER EVER come up to temp. because the heater-core can pull more heat out of the engine than it can create.
 
Never owning a diesel, or a VW before, is there anything else I need to consider? Consider adding diesel-fuel additive at EVERY fillup. There are many benefets including 2-4 more MPG, longer fuelpump life and quieter running.
 
Also, do not assume the dealership knows how to effectively maintain diesel engines beyond basic stuff. You MUST use special oil which is not readilly available in North America. (I order all my supplies from tdiparts.com)
 
Unlike Asian automobiles which can be pretty much ignored... VWs are better off when meticulusly maintained per the reccomended schedule.
 
Best of all.... it is WONDERFUL to be able to travel 700+ miles per tank of fuel!!!!
#2473 of 3707
Re: TDI makes the News [noa1] by olive4
Oct 17, 2008 (2:51 pm)
Reply

Replying to: noa1 (Oct 17, 2008 10:36 am)

I think you replied to the wrong post -- mine was just a link to an article published in the Detroit News giving the Jetta TDI a very good review. I already have my TDI and have no trouble finding diesel anywhere in my area.
#2474 of 3707
Re: Considering a TDI for their high fuel economy [bpeebles] by m6user
Oct 17, 2008 (6:52 pm)
Reply

Replying to: bpeebles (Oct 17, 2008 1:42 pm)

Depends on many variables. On a cold morning, (-15F) it may take 10-20 miles of driving. HOWEVER, if you turn the heat all the way up... the engine will NEVER EVER come up to temp. because the heater-core can pull more heat out of the engine than it can create.
 
Is this pretty much the case with even the newer models? I live in Chicago area and normally get nice hot air from my cars(gassers) in about 1 to 3 miles depending on outside temp. How about weather that is between 0-20F, would it take anywheres near that long? I know there are a lot of positives to owning one but waiting 10-20 miles(15-30 minutes???) for the interior to warm up would be kind of a bummer.

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