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      11-08-2012, 10:13 AM   #5
335BBS
Brigadier General
Canada
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Drives: 2009 335 coupe.
Join Date: Jan 2010
Location: Toronto, Ontario

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Quote:
Originally Posted by Speedwagon View Post
All of a sudden my 328IX E91 is getting 22.7 mpg, was 14-18 mpg, and I didn't reset the computer. I'm still driving over 100mph on the autobahn and slow city driving. I have 4800 miles on my E91. The only thing that is different is, I put 18" wheels with DWS tires on about 500 miles ago. I can't believe that the new tires would help that much with the MPG! Can this be true?
I wouldnt have thought that kind of gain would be possible.