77MPG Volkswagen Passat TDI

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From the same website:-

Couple Travels Record-Breaking 1,626 Miles on a Single Tank of Gas in a 2012 VW Passat

The Taylors set a new record of 1626.1 miles on one tank, which equates to an average of 84.1 miles per gallon during the three-day trip, which took them through nine states. The three-day drive commenced on May 3, 2012 in Houston, TX and ended on May 5, 2012 in Sterling, Virginia.
 
Originally Posted By: cpayne5

"The 95 mpg is what I typically get while driving at a constant speed from 30 to 65 mph on a flat road in 80 degree F temperatures with well broken-in tires."


and the hypermiling techniques used for the tdi numbers were done in the same way (although w/ newish tires most likely)
 
does hypermiling technique really apply to diesels? They don't suffer pumping losses in the same manner that gas engines do-- there's not a restriction with a throttle on the intake.

Throttle= high vacuum under cruise, so the atmospheric pressure of ~14 psi (excluding exh losses) is greater than the what... 3-4psi (absolute) present on the intake side of the motor (1 atmosphere at sea level = 14.7 psi). Soooo... a gas engine is always having to pump up to that atmospheric pressure.... High load = open throttle = less difference between intake and exhaust, excluding exh losses... which is why a gas motor is more efficient under load.

whereas a diesel, has no throttle plate to restrict intake.... it's 100% open all the time and just varies fuel rate. Less pumping loss... homey don't care...

so the hypermiling techniques that rely on pulse/glide and other derivatives... don't apply to diesel, right???

I'm asking--- showing what I know... then asking.... not an expert here.

(hypermiling WRT minimizing brakes use, yes I see that applying..)
 
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I can get 45mpg on my 1993 gasoline Geo Prizm Lsi 5speed on hwy at min speed limt 45mph. I won't do that considering other cars behind me. My car pool buddy use to drive 50mph Toyota Prius on left lane just to get 5mpg extra. I kindly remind him to be more considerate to other vehicle behind. People are crazy test the vehicle limit without considering other factors nowadays.
 
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T= turbo D= direct I= injection
my 84 had 450k .
1.23-1.5 qts of make up at 10k oci's
drivin like you stole it [censored] thing still would get 38+mpg.
If I find another motorhome shed find with low miles i will rock that one for 350k.

Ken
 
Sure, the engine may last for ages, but in newer diesels, the smog devices and fuel system might not go the distance.

Anyway, I am always keeping my mom updated on the Mazda CX-5 diesel because she wants something with that styling but still can get 40 MPG or more.
 
Originally Posted By: artificialist
Sure, the engine may last for ages, but in newer diesels, the smog devices and fuel system might not go the distance.


Very true; turbo, fuel pump, and the new piezo injectors are Achilles heel in higher mileage TDI. Very expensive to repair.
 
Originally Posted By: nitehawk55
Originally Posted By: Sunnyinhollister
I had three VW Jettas and the last one cure me from owning one again. I will never let another VW stain my driveway again. Poor quality, poor design, and definitely poor support from VWoA. Others have said it, but buying a new VW is buying a new car with no warranty.


Can you give a bit more detail on this ?


The 1998 and 2003 were OK. The 2005.5 PD was a great car to drive, when it wasn't on the back of a tow truck. On top of that, the DMF was on recall everywhere else in the world, just not in the US. The rear brakes were biased to the point that the pads were down to the rotors after 30k highway miles. The service for the most part is horrible due to the dealers inability to overcome VW's design defects. The way VW works is blame the customer. The last time around, I took the vehicle in for a check engine light. The vehicle would develop a misfire under certain conditions. VW blamed me for "causing a backfire by coasting in neutral" when coming to a stop. That was the last straw for me. It was a very common problem at the time, but VW had no resolution for it I guess. A while later some ingenious owner figured out it was related to cam timing and posted the resolution on the TDI web site. The factory who designed and built the car never bothered to come up with a solution. I got tired of having to waste my time getting it towed to the dealer and having to fight for service under warranty conditions. If I was to get a newer diesel, I would probably get a Cruze.
 
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I get over 42mpg @65mph with the AC with my 2.0 Gas N/A car. Not running the AC I can get over 46mpg. I don't see any good reason to choke a diesel car down so it gets no higher than 46mpg under the same conditions. Heck the diesel Focus in Europe is good for 67mmpg and keeps up with traffic flow. That is UNHEARD OF in the US.
 
It's NOT VW products that are the problem, it is the LOUSY
US distributor VWoA, and their equally LOUSY dealer network.

Where are the products to compete? No Polo (Fiesta, Rio, Accent, Fit, ect competitor)

The only thing these idiots at VWoA think is important is the stupid New Beetle which is way past it's novelty and the current one is a big dud. Should never have been created. The horrible Chrysler Routan Minivan...LOL. Where is the innovative Up! ???

If you look at VW around the world they simply don't have these problems....VAG needs to fire most of VWoA staff and rebuild the distributor infrastructure, and the dealer network.
 
Originally Posted By: antiqueshell
It's NOT VW products that are the problem, it is the LOUSY
US distributor VWoA, and their equally LOUSY dealer network.

Where are the products to compete? No Polo (Fiesta, Rio, Accent, Fit, ect competitor)

The only thing these idiots at VWoA think is important is the stupid New Beetle which is way past it's novelty and the current one is a big dud. Should never have been created. The horrible Chrysler Routan Minivan...LOL. Where is the innovative Up! ???

If you look at VW around the world they simply don't have these problems....VAG needs to fire most of VWoA staff and rebuild the distributor infrastructure, and the dealer network.


Well I have to disagree a little. The DMF fiasco was a design issue. I guess not recalling it in the US might be the result of VWoA. The 1.8L sludge motor could be blamed on both I guess as well as the consumer. The camshaft failures of the PD motor was a design/manufacturing issue. The rear brakes on my 2005.5 was also a design issue. The current issues with the high pressure fuel pumps are also design related. Yes. we have a different lubricity standard in the US, but you don't release a product in the US that is not compatable with it. The miss at idle was both a manufacting issue, but the factory never came up with a solution for it. The lousy service made it worse. The ignition lock cylinder that fell apart and the fan controller that failed were also not the fault of VWoA.

Don't get me wrong, VWoA makes a lot of poor business choices and tries to blame the consumer all to often, but they cannot overcome a design issue.
 
I think I might never drive a diesel car. Every time a diesel Jetta passes by it sounds like farm equipment.
 
Originally Posted By: Zako2
I think I might never drive a diesel car. Every time a diesel Jetta passes by it sounds like farm equipment.


The older ones maybe. The 2009+ ones are near silent; quieter than most gas-powered cars in my experience.
 
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