run flat and gas mileage

autoart · 02-12-2014, 11:13 PM

Do run flats give you better gas mileage? It seems that my mileage has gone from 21mpg to 18mpg and the only thing I did was remove the run flats.

VMRWheels · 02-13-2014, 12:20 PM

I wouldn't say so. If anything, you might get better gas mileage since you're lowering the weight of your tires! Check your pressures to make sure that they're correct and go from there.

turo · 02-13-2014, 02:49 PM

OP, did you change wheels or tire sizes? I'll second the tire pressure check.

autoart · 02-13-2014, 11:53 PM

I went from 193m rims and tires to 220m rims and tires. My tire pressure is 40psi all around, which was the same psi I had on the other rims/tires.
The tires size did change from 225/255 to 235/265

Geraldo · 02-14-2014, 12:53 AM

Quote:

Originally Posted by VMRWheels

I wouldn't say so. If anything, you might get better gas mileage since you're lowering the weight of your tires! Check your pressures to make sure that they're correct and go from there.

Nice opinion.

Rick328 · 02-14-2014, 09:29 PM

Quote:

Originally Posted by autoart

I went from 193m rims and tires to 220m rims and tires. My tire pressure is 40psi all around, which was the same psi I had on the other rims/tires.
The tires size did change from 225/255 to 235/265

I would say a larger contact patch of the tire 235>225 means more rolling resistance, thus increasing gas mileage. But that much more... not so sure...

:

SLOWER · 02-15-2014, 09:46 PM

My MPG did not change at all when I switched.

02-12-2014, 11:13 PM	#1
autoart Colonel 347 Rep 2,281 Posts Drives: 2009 335i e90 M/ 22 X3 Join Date: Oct 2010 Location: socal iTrader: (8)	run flat and gas mileage Do run flats give you better gas mileage? It seems that my mileage has gone from 21mpg to 18mpg and the only thing I did was remove the run flats.
	Appreciate 0 Tweet Quote

02-13-2014, 12:20 PM	#2
VMRWheels BimmerPost Supporting Vendor 2038 Rep 25,989 Posts Drives: BMW Join Date: Jun 2007 Location: Anaheim, CA iTrader: (4) Garage List 2013 BMW M3 [10.00] 2015 BMW M4 [0.00] 2013 BMW F30 [0.00] 2014 BMW F22 [0.00] 2013 BMW F06 [0.00]	I wouldn't say so. If anything, you might get better gas mileage since you're lowering the weight of your tires! Check your pressures to make sure that they're correct and go from there. __________________ VMR\|Wheels \| 714.442.7916 \| sales@velocitymotoring.com \| www.velocitymotoring.com \| facebook \| flickr \| Instagram
	Appreciate 0 Quote

02-13-2014, 02:49 PM	#3
turo Lieutenant 163 Rep 468 Posts Drives: Yes Join Date: Jul 2011 Location: North VA iTrader: (2) Garage List 2011 BMW 335i [8.40] 2024 BMW M2 [9.00] 2018 BMW 340i XDrive [10.00]	OP, did you change wheels or tire sizes? I'll second the tire pressure check.
	Appreciate 0 Quote

02-13-2014, 11:53 PM	#4
autoart Colonel 347 Rep 2,281 Posts Drives: 2009 335i e90 M/ 22 X3 Join Date: Oct 2010 Location: socal iTrader: (8)	I went from 193m rims and tires to 220m rims and tires. My tire pressure is 40psi all around, which was the same psi I had on the other rims/tires. The tires size did change from 225/255 to 235/265
	Appreciate 0 Quote

02-15-2014, 09:46 PM	#7
SLOWER Lieutenant Colonel 309 Rep 1,733 Posts Drives: 2003 M3 Join Date: Apr 2013 Location: MA iTrader: (8) Garage List 2024 BMW X5 M60i [0.00] 2003 M3 Convertible [0.00]	My MPG did not change at all when I switched.
	Appreciate 0 Quote