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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW Passat Family (NMS and B7) TDIs (2012+)

VW Passat Family (NMS and B7) TDIs (2012+) Discussion area for the 2012+ Passat TDI (North American and rest of world versions versions). The North American model was previously codenamed NMS (New Midsize Sedan) and the version the rest of the world gets is sometimes referred to as B7.

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Old March 2nd, 2016, 21:11   #1036
pkforbes87
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I've seen no noticeable decrease in fuel economy due to 23N5. It shouldn't have had a big effect on anything but DEF usage. Jettas/Golfs got recall 23O6 as the equivalent of our Passats getting 23N5 - the goal of each was to decrease NOx emissions. Those models need to use extra fuel to decrease NOx, so their fuel economy suffered, our 13+ (or is it 12+?) Passat models have the luxury of just using more DEF to achieve the same thing.

Attached is my fuel economy over the time I've owned the car. I moved from Missouri to California in February of 2015, so the dip in the middle was winter in the midwest. I got 23N5 performed in January of 2015 and as you can see, there's no lasting decrease in fuel economy following that date.

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Old March 3rd, 2016, 08:40   #1037
4thvwdiesel
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Just bought my 2014 6-M 10 days ago - just under 22K miles on the odo. On the 650 mile drive back to home in MD I got 57.0, GPS moving avg MPH was 63.5. Trip to NYC and back last weekend with three of us and our gear, including driving in the city, averaged 51.3

I'm satisfied!
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Old March 4th, 2016, 10:56   #1038
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Let me start by saying this is not "real world mpg", but it is possible on a bone stock 2013 Passat TDI SE 6M.

I filled up at a Sinclair in Idaho Falls, ID - with winter blended diesel of all things. This trip included two overnight stops in Layton, UT and St. George, UT, and two stops at job sites lasting throughout a normal workday, so a total of four stops long enough to allow the engine to cool completely. As most of you probably know, driving non-stop through an entire tank would net better results as fuel efficiency is much greater at operating temperature than any other time. My route was I-15 south through Salt Lake City and Vegas, then Highway 58 to Bakersfield, CA and eventually Wasco, CA - which means this tank was, overall, >4000' downhill. I was also driving with cruise at 60mph except for a few short stints up to 70-75mph where 60mph would have been unsafe because traffic was moving so much faster.

I usually drive at much more reasonable speeds, but knew from past experience that this was going to be a perfect opportunity to squeeze 1000 miles out of a tank.

Edit: Just for reference, my MFI calculated MPG was 60.0 for this tank. That margin of optimistic error is perfectly in line with what I see out of this car.

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Old March 11th, 2016, 10:21   #1039
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Quote:
Originally Posted by pkforbes87 View Post
Let me start by saying this is not "real world mpg", but it is possible on a bone stock 2013 Passat TDI SE 6M.
I have no problem getting high 40's and breaking 50 on my 2013 Passat 6M. But, the city driving just kills this car. I think my fuelly average is around 43 average, which is nothing to shake a stick at. Best road trip car I've ever owned though. Absolute pleasure to drive and will return 48mpg at 75mph. Great car.
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Old March 12th, 2016, 18:25   #1040
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Quote:
Originally Posted by 16vjohn View Post
Best road trip car I've ever owned though. Absolute pleasure to drive and will return 48mpg at 75mph. Great car.
I agree 100%. Mine spends its life averaging a little over 1000 miles/week on the interstate and it performs exponentially better than any other vehicle I can imagine driving in the same way.

FYI, I've seen slowly but consistently improving fuel economy since passing 100k miles with a noticeable jump after 130k. I'm guessing most of that slow increase is due to continued break-in of an engine built to minutely-precise tolerances, and the jump after 130k was due to the new timing belt. The small amount of slack in the old belt may have allowed timing to be inaccurate by some fractional degree.
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Old April 13th, 2016, 21:14   #1041
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I just got my best tank ever on the 2015.

http://www.fuelly.com/car/volkswagen...16vjohn/353642

I paid careful attention to the way I was driving it... I didn't change my driving style too much, but I did pay attention to throttle position going up hills and such. The tank average was 50.5mpg. My commute is about 20 miles one way and it's mostly flat. A few inclines and then equal declines. The MFA read just under 55mpg. That's consistent with what I observe that the MFA overreports by about 5mpg.

I decided to try something new the last few days. I changed the MFA to "instant MPG" and I set a goal of not letting go under 50mpg. This isn't hard to do, but does require slowing down 5-7 mph on the highway when gaining a little altitude. I got home and changed it to the daily average and was absolutely shocked to see that my 20 mile commute had average 67MPG . If my observations are true, this should net me in the high 50's real world mpg. I've got 300 miles left to go on this tank, with a MFA tank average of 55.5. So, we'll see what happens.

Anybody have similar observations with the MFA readout?
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Old April 14th, 2016, 05:18   #1042
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I've used VCDS to tweak my MFD display. I can't remember the setting, but default was 100% and I changed it to 105%. Now my MFD actually reads low by 1-3 MPG. I keep meaning to change it to 104% to see if it gets closer. Right now, when I fill up the MFD is usually around 37 MPG, while my Fuelly calculation will be closer to 39-40. It's been consistent for months, so I know it's not me not filling up completely on some tanks. I'm only about 25% freeway driving overall. Of course, I have the DSG as well, not the manual.

I'll have to try your trick about using the instant readout, but traffic may not permit me to keep it that high. I don't want to be one of "those" people driving too slowly and impeding the flow.
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Old April 14th, 2016, 07:00   #1043
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Both the odometer reading and the MFD fuel economy are off from factory, both read high, and can be calibrated using VCDS. After recalibrating them both, I find my MFD fuel economy is usually off by no more than 2mpg, typically 1mpg. My best tank, calculated, is just over 58mpg, my average since day one is about 52mpg. I have had a few trips where my MFD fuel economy was 63mpg. For the size of the vehicle... it is about impossible to be the FE of the Passat TDI. If you look at my fuelly graph, my winter averages are off due to different sized snow tires.
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Old May 15th, 2016, 13:40   #1044
charleshickman
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I was in Washington DC last week for a conference. I wanted to check out my '15 Passat as a highway vehicle and so I drove. It was 700 miles or so to DC and about 1600 total for the trip. The display mileage up there was over 55 and the display showed 51.2 for the entire trip when I got home. No A/C on the way up there. Some on the way back. Probably half the way back was I-64 through the mountains.
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Old June 2nd, 2016, 10:55   #1045
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'12 6speed manual sitting on 19x9.5's. Went from Melbourne Fl to Franklin TN ( just outside of Nashville) on one tank. 780 miles. 75-80 mph whole way with AC set at 72 just a couple clicks on. Cant beat that.
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Old June 23rd, 2016, 14:04   #1046
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My running average has ticked up to 52.6 MPG after 25,000 miles of ownership (49,500 on vehicle).
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