K&N drop in on 128i

bam9382 · 02-20-2011, 02:17 PM

Anyone just have the plan drop in filter... I am under warranty and do not want to do any big mods, however I would like to drop a filter that would help out in the MPGs...

Anyone have one? notice a difference? I have been reading mixed reviews, I know it depends on how you drive. I was wondering if anyone drove conservatively with the filter before and after and compared MPGs??

Riley1524 · 02-22-2011, 04:57 PM

I have had the K&N drop in for a couple of months now and can't say that it helped out my gas consumption to a noticeable effect. It may help by a couple of miles depending on driving habits, but I cant tell

chachacha28 · 02-22-2011, 05:19 PM

it depends on if it makes noise. mods that are supposed to help gas mileage usually sound nice, so i usually get worce mpg's because i want to hear them.

also, i dont know about this car, but i know some vehicles have issues running oiled filters because of MAF/MAP sensors getting coated in the oil after time. just something to think about.

.02

Tom K. · 02-24-2011, 10:42 AM

I last installed a K&N drop in filter in a Honda 6 cyl. motorcycle many years ago. There was absolutely no difference in gas mileage - the only advantage was that the K&N could be cleaned, oiled and re-used.

Tom

Riley1524 · 02-24-2011, 02:08 PM

Quote:

Originally Posted by Tom K.

I last installed a K&N drop in filter in a Honda 6 cyl. motorcycle many years ago. There was absolutely no difference in gas mileage - the only advantage was that the K&N could be cleaned, oiled and re-used.

Tom

This was the same reason I bought the K&N

bam9382 · 02-24-2011, 03:22 PM

Yea, i have had them in the past... but i was never concerned with MPG so I never did a measurement of before and after..

So i was wondering if anyone else had

bam9382 · 02-25-2011, 09:47 AM

Pulled the trigger and bought this today. I will post my MPG results as they come

bam9382 · 03-22-2011, 04:27 PM

After a couple weeks of testing, the drop in filter does increase mileage!! Ive avg 1.5 more mpg with the K&N Filter! With gas prices like this it should pay itself off in a couple months. I got it on amazon for cheap!

Bimmer_Freak · 03-22-2011, 05:23 PM

^ More importantly though, how does it sound?

Evice · 03-23-2011, 12:14 PM

more air equates to more fuel usage in my opinion. expect less mpg, enjoy abit more sound if any.

bam9382 · 03-28-2011, 02:32 PM

Fuel economy increased. It takes both gas and air to make combustion, the factory filter does not breathe well. This added air flow probably is not enough to skew the fuel map at all. So it ultimately is just burning fuel more efficiently. Hints the 1-1.5 increase

Sounds about the same.

02-20-2011, 02:17 PM	#1
bam9382 Private 12 Rep 83 Posts Drives: 2008 128i Coupe Join Date: Jan 2011 Location: Dallas iTrader: (0)	K&N drop in on 128i - effect on MPG Anyone just have the plan drop in filter... I am under warranty and do not want to do any big mods, however I would like to drop a filter that would help out in the MPGs... Anyone have one? notice a difference? I have been reading mixed reviews, I know it depends on how you drive. I was wondering if anyone drove conservatively with the filter before and after and compared MPGs??
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02-22-2011, 04:57 PM	#2
Riley1524 Captain 63 Rep 638 Posts Drives: A Slow Ass BMW Join Date: Feb 2011 Location: Atlanta, Ga. iTrader: (4)	I have had the K&N drop in for a couple of months now and can't say that it helped out my gas consumption to a noticeable effect. It may help by a couple of miles depending on driving habits, but I cant tell __________________ 2015 428i Coupe 2009 328i E93
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02-22-2011, 05:19 PM	#3
chachacha28 NCOIC of Kickin It 78 Rep 946 Posts Drives: 08 135i "Simona" Join Date: Feb 2011 Location: Great Falls MT iTrader: (1)	it depends on if it makes noise. mods that are supposed to help gas mileage usually sound nice, so i usually get worce mpg's because i want to hear them. also, i dont know about this car, but i know some vehicles have issues running oiled filters because of MAF/MAP sensors getting coated in the oil after time. just something to think about. .02
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02-24-2011, 10:42 AM	#4
Tom K. Major General 124 Rep 5,627 Posts Drives: '07 328iT, '13 Boxster Join Date: Mar 2008 Location: Maryland iTrader: (0)	I last installed a K&N drop in filter in a Honda 6 cyl. motorcycle many years ago. There was absolutely no difference in gas mileage - the only advantage was that the K&N could be cleaned, oiled and re-used. Tom
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02-24-2011, 03:22 PM	#6
bam9382 Private 12 Rep 83 Posts Drives: 2008 128i Coupe Join Date: Jan 2011 Location: Dallas iTrader: (0)	Yea, i have had them in the past... but i was never concerned with MPG so I never did a measurement of before and after.. So i was wondering if anyone else had
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02-25-2011, 09:47 AM	#7
bam9382 Private 12 Rep 83 Posts Drives: 2008 128i Coupe Join Date: Jan 2011 Location: Dallas iTrader: (0)	Pulled the trigger and bought this today. I will post my MPG results as they come
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03-22-2011, 04:27 PM	#8
bam9382 Private 12 Rep 83 Posts Drives: 2008 128i Coupe Join Date: Jan 2011 Location: Dallas iTrader: (0)	After a couple weeks of testing, the drop in filter does increase mileage!! Ive avg 1.5 more mpg with the K&N Filter! With gas prices like this it should pay itself off in a couple months. I got it on amazon for cheap!
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03-22-2011, 05:23 PM	#9
Bimmer_Freak Private First Class 13 Rep 151 Posts Drives: 2011 135i DCT Join Date: Aug 2010 Location: Sydney, Australia iTrader: (0)	^ More importantly though, how does it sound? __________________ Current: 2011 135i DCT M-Sport - Space Gray\| black leather/Poplar grain\| Business Nav\| Sunroof - *SOLD!*
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03-23-2011, 12:14 PM	#10
Evice Major 194 Rep 1,457 Posts Drives: E92M3 Join Date: Apr 2009 Location: Somewhere here iTrader: (1)	more air equates to more fuel usage in my opinion. expect less mpg, enjoy abit more sound if any. __________________ My Track Videos
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03-28-2011, 02:32 PM	#11
bam9382 Private 12 Rep 83 Posts Drives: 2008 128i Coupe Join Date: Jan 2011 Location: Dallas iTrader: (0)	Fuel economy increased. It takes both gas and air to make combustion, the factory filter does not breathe well. This added air flow probably is not enough to skew the fuel map at all. So it ultimately is just burning fuel more efficiently. Hints the 1-1.5 increase Sounds about the same.
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