New Tires, Better MPG!

Speedwagon · 11-08-2012, 04:48 AM

Sorry

J02 335i · 11-08-2012, 04:49 AM

They sure could, if you went to non run flats. They are alot lighter.

efdiesel3s · 11-08-2012, 05:23 AM

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?

slowSwede · 11-08-2012, 08:43 AM

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.

335BBS · 11-08-2012, 09:13 AM

Quote:

Originally Posted by Speedwagon

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.

cypis007 · 11-08-2012, 10:10 AM

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.

Wires · 11-08-2012, 08:07 PM

Also depends on the rubber. Some have a lot less rolling resistance. Usually the less rolling resistnace, worse grip though.

11-08-2012, 04:48 AM	#1
Speedwagon First Lieutenant 7 Rep 366 Posts Drives: Sportwagon Join Date: Sep 2012 Location: Colorado iTrader: (0)	Sorry Last edited by Speedwagon; 11-16-2012 at 06:15 AM..
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11-08-2012, 04:49 AM	#2
J02 335i Lieutenant Colonel 39 Rep 1,558 Posts Drives: F80 M3 Join Date: Aug 2010 Location: Ontario iTrader: (1)	They sure could, if you went to non run flats. They are alot lighter. __________________ Sport pack, JB3, Dci, factory oil cooler, 18" M3 reps, Michelin PSS, painted trim, black grills, smoked side markers, LED plate lights, H&R coils, Borla catback
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11-08-2012, 05:23 AM	#3
efdiesel3s Halle Berry or Hallelujah 1 Rep 57 Posts Drives: '11 335d, '93 fd3s, '90 e30 m3 Join Date: Feb 2010 Location: Los Angeles iTrader: (0)	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, 08:43 AM	#4
slowSwede Lieutenant 21 Rep 549 Posts Drives: 335 coupe Join Date: Jan 2010 Location: Skåne iTrader: (0)	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, 10:10 AM	#6
cypis007 Private 0 Rep 83 Posts Drives: E91 318d Touring Join Date: Nov 2011 Location: Capital iTrader: (0)	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, 08:07 PM	#7
Wires Brigadier General 1644 Rep 4,870 Posts Drives: 2016 340i xDrive Join Date: Apr 2008 Location: Calgary iTrader: (0)	Also depends on the rubber. Some have a lot less rolling resistance. Usually the less rolling resistnace, worse grip though.
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