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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > New Tires, Better MPG!

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      11-08-2012, 05:48 AM   #1
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Last edited by Speedwagon; 11-16-2012 at 07:15 AM.
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      11-08-2012, 05:49 AM   #2
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They sure could, if you went to non run flats. They are alot lighter.

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      11-08-2012, 06:23 AM   #3
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well they say you get more mpg as you break the car in. but then again you say you only have 4800 miles and put on new tires 500 miles ago, so you burnt through the run flats in 4300 miles? are you sure those tires were inflated?
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      11-08-2012, 09:43 AM   #4
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I notice roughly 10% differences in mpg between different tires.
The fatter tires the more gas is wasted...or spent happily due to the added grip however you want to look at it.
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      11-08-2012, 10:13 AM   #5
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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.
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      11-08-2012, 11:10 AM   #6
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Pressure also matters. Old tires could had drop, in time (few months), from 2.5 to 2.0 bar, progressively. New tires are pumped up to 2.5 and that gives your significant gain in mpg.
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      11-08-2012, 09:07 PM   #7
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Also depends on the rubber. Some have a lot less rolling resistance. Usually the less rolling resistnace, worse grip though.
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