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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 Today, 03:46   #16
Veteran Member
Join Date: Jun 2003
Location: Central IL

Originally Posted by jrm View Post
Rico, prior update in cold weather we averaged low 40's now we are low 30mpg range- <snip>
Yeah, we've never seen anything that bad. If we get some typical winter temperatures here in Central IL (20F), I've seen some high 30's figures, but that's as low as it's been.
BTW- glad you caught the robber!

"I reject your reality and substitute my own."
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Old Today, 06:33   #17
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Join Date: Aug 2003
Location: Deer Park, Washington

It isn't just the cold weather affecting diesel mileage. Work in a refinery and we have switched over to making diesel with a colder freeze target so it does not gel up in the winter. The freeze in the summer is as high as +20 F but in the winter is can be as low as -45 or more. What we have to do is drive some of the heavier components out of the diesel making it a lighter fuel which has less BTU's than heaver fuel. So your mileage goes down. But some have stated that they loose 10 mpg, I have been driving car and PU diesels for over 40 years and my experience is I only lose a couple of MPG. 10 MPG loss sounds excessive and I would look into it if it were my vehicle.
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