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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 14th, 2018, 03:34   #16
Veteran Member

Originally Posted by GreenLantern_TDI View Post
5 mpg difference from 18" wheel to a 17" wheel with the same ODs? Hows that even possible?
My guess is it is because the 18" setup is a few lbs heavier at each corner AND a bit wider (235 vs 215) AND newer tires. Yes same OD but, more to a mounted wheel than OD. 18" don't ride "bad". Just subtle differences I noted above.


Blue '15 Passat SE TDI DSG (part 1 emissions fixed, B: 2/2018)
Black '15 Passat SE TDI, 6-speed manual (buyback pending, B: 4/2015)
Silver '10 JSW TDI, 6-speed manual (B: 10/2009, S: 4/2015)

Last edited by JKC_NC; March 22nd, 2018 at 20:03.
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Old March 14th, 2018, 04:46   #17
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Join Date: Aug 2009
Location: NH

Id go with it was a single fill up example.

I'd believe on the highway you may see 1-2 but no way would you see 5 mpg tank after tank after tank.

We run 16" 215-65-16 Haka 8 studded winters and 235-45-18 with some sort of bridgestones in summer. Our MPG are about the same, if you ran a decent LRR summer tire I can see a slight increase.
Hers: 2015 Passat SEL (NOS) w/ VW fix and Malone Stage 2.
His: 2017 Alltrack SE, waiting for TSI to TDI conversion kits to be released.
Bought back 2010 Sedan, cog swapper, build date 07/09, BB 6/7/16. 2012 Passat, Roof+Nav, build date 05/12, BB 7/11
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