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Keep K&N or NOT ? #4932835 11/23/18 09:12 AM
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SubeeTedII Offline OP
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So I have a 2005 Subaru Legacy Wgn, with the 2.5 single over head cam.
I got this car about 6 years ago, first thing I did was drop a K&N air filter into it !
Well, sad to say I haven't looked at that filter in years, well I just did , and really not too dirty !
So I have the cleaning and re-oiling kit, been inside my house for years and the cleaner doesn't feel like being pumped out of the bottle.
So here is were the "fun" begins.
I posted on the Ultimate Subaru forum and asked is there another cleaner I can use, got no real answer, but I did get a lot of pushback on the K&N filter, lots of people saying just dump it !
I guess the thought is that when you clean and re-oil it, the chance that you might get oil on the MAF sensor isn't to be fooled with !
I just saw the video below that I found here.
I just watched the video below were this guy is testing filters of different types on a dyno, then real world.
And yes it's a Subaru and yes it's a K&N filter too.
I'm not so much interested in the performance results, but what he says at the bitter end of this video, he talks about the charcoal filter that is there . 

I find the idea ridiculous that the oil from the K&N filter can migrate pass this panel and get to the MAF sensor !
https://www.youtube.com/watch?v=GS69owXpGdY

So if I dump it, then I'm finding that is a sea of options other than good old OEM paper replacements !
UGH!

Re: Keep K&N or NOT ? [Re: SubeeTedII] #4932836 11/23/18 09:14 AM
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OVERKILL Offline
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The stock filter should be just fine, put a stock one back in it.


2019 RAM 1500 Sport - Mobil 1 EP 0w-20, FRAM Ultra
2019 Audi e-tron technik (my wife hates it)
Re: Keep K&N or NOT ? [Re: SubeeTedII] #4932841 11/23/18 09:21 AM
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AZjeff Offline
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It wil be 9 to 1 to ditch the K&N for more reasons than oiling the sensor.

But if you're intent on using it keep going, it got you this far and you ignored it.



14 RAV4 2.5 5W-20 PP
18 Nissan Titan 5.6 DI, 0W-20 QSUD

The most important thing to do in your life is to not interfere with someone else's life. - Frank Zappa

Re: Keep K&N or NOT ? [Re: OVERKILL] #4932843 11/23/18 09:22 AM
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Bud_One Offline
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Originally Posted by OVERKILL
The stock filter should be just fine, put a stock one back in it.


+1


20 Pilot LX - Factory Fill
14 Civic LX Sedan- Castrol Mag 0W-20,XG7317
05 Chevy Crew Cab 2500HD- QSUD 10W-30,PF61E
97 Accord EX Wagon- Napa PPSB 5W-30,Napa 21334
Re: Keep K&N or NOT ? [Re: SubeeTedII] #4932866 11/23/18 09:45 AM
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SubeeTedII Offline OP
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So I just snooped around here and looked into the posting about " Best " air filter.
These MAHLE filters seem interesting ?!

Re: Keep K&N or NOT ? [Re: SubeeTedII] #4932878 11/23/18 10:00 AM
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Killer223 Offline
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Posts: 419
the air filter is the MOST important filter on an engine.

https://youtu.be/gNQ6d3ox5Ok


19 accord 6sp 2.0T
04 5.9 cummins
95 12V NV4500.
11 ranger 4.0
18 crf450RX
19 Talon
17 Pioneer 1k.
Re: Keep K&N or NOT ? [Re: SubeeTedII] #4932901 11/23/18 10:28 AM
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Posts: 794
marine65 Offline
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I put a Spectre filter a knock off of a K&N on the Sentra.
I run full syn oil for 10K.
I noticed the oil was black at about 4K.
I switched back to a paper filter and the oil still looked almost new at 4K.
So I'm thinking the Spectre filter was letting in more dirt.
Keeping the oil cleaner is more important than any gains made by the Spectre filter,gains I didn't see anyway.
It's a Sentra,not going to be a super car with any filter LOL.


2018 Hyundai Elantra GT black
2018 Hyundai Elantra GT silver
yup got two of them.
Re: Keep K&N or NOT ? [Re: SubeeTedII] #4932909 11/23/18 10:34 AM
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CT8 Offline
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Only you can decide what to do. I can't think for you. I would have never bought the [email protected] They have their purposes though.


2015 F150 2.7
2018 F350 6.2
Re: Keep K&N or NOT ? [Re: SubeeTedII] #4932955 11/23/18 11:33 AM
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bubbatime Offline
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Throw that rock catcher in the trash can and put a real air filter in it.

Re: Keep K&N or NOT ? [Re: SubeeTedII] #4933001 11/23/18 12:39 PM
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Linctex Offline
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Sell it on ebay, buy a good paper filter for it instead


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Keep K&N or NOT ? [Re: SubeeTedII] #4933010 11/23/18 12:49 PM
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JeffKeryk Online Content
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K&N flow a little more air because they filter a little more poorly.
A little more HP and torque but you will never feel it.
I would use a quality filter (not a cheepie) and be done with it.
You can always keep the K&N in your garage.


2018 Tesla Model 3, Medium Range Battery
2018 Lexus RX450h
2013 Lexus GS350 F Sport
2006 Acura TSX
2001 Tundra Access Cab, 1998 Accord LX, 1968 Corvette L36 Roadster, 1965 Olds 4-4-2
Re: Keep K&N or NOT ? [Re: SubeeTedII] #4933028 11/23/18 01:15 PM
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DrDanger Offline
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K&N user for 10 years. Nothing broken. Air quality drops to 150-200 here, in winter months. 6-7k mile OCI's.

Re: Keep K&N or NOT ? [Re: JeffKeryk] #4933031 11/23/18 01:15 PM
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maxdustington Offline
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Originally Posted by JeffKeryk
K&N flow a little more air because they filter a little more poorly.
A little more HP and torque but you will never feel it.
I would use a quality filter (not a cheepie) and be done with it.
You can always keep the K&N in your garage.
I doubt you will see any power gains at anything but WOT or increased MPG from a drop-in filter. The K&N CAI with the large cone filter might give you a few hp but you could probably make your own CAI with a paper filter for similar gains.

K&N is all marketing from when the layman could not modify computer controlled cars in the 90s.



Last edited by maxdustington; 11/23/18 01:16 PM.

99 Toyota Tercel CE 5EFE/C151
PUP 5W30/Ultra
Re: Keep K&N or NOT ? [Re: SubeeTedII] #4933038 11/23/18 01:27 PM
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StevieC Offline
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Everyone knows that it's the K&N sticker on the car that makes it go faster and not the air filter itself. LOL


'18 Caravan - 50k KM - AMSOIL SS 0w20, Fram Ultra, TC-W3 500:1
'06 Santa Fe - 535k KM (Retired)

There is no such thing as "lifetime" fluids! mad
Re: Keep K&N or NOT ? [Re: StevieC] #4933044 11/23/18 01:34 PM
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SubeeTedII Offline OP
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Maybe I can put my " I just Voted " sticker over it !

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