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#4483239 - 08/09/17 12:14 AM K&N Air Filter
Wreckage Offline

Registered: 10/14/16
Posts: 60
Loc: Australia

Before everyone says 'they are good for the bin'...

I need either a Ryco A1297 Air filter or the equivalent in K&N which is a 33-2054

I spoke to a few people today and mechanics, told them everyone tells me they are the worst air filter for an every day car...

They told me if you oil them regular, and use them how they are supposed to be used, they are actually better at filtering the junk. If you just oil it and stick it in the car and drive, that isn't what you are supposed to do but let it dry first and then you have no issues + they are reusable and made different to how they were before. Now you buy a spray can, you spray it on and finished, very quick and easy and works and filters better than regular filters.

Spoke to another guy, he has been using them for years without any issues. He said he heard all the stories how they are bad etc, but after using them for years, he doesn't know why they get the flack when they actually filter properly/better than the paper elements. The whole reason they use oil is to trap the dust (kinda sticky if you will), clean and re-use all while enjoying better air flow at the same time.

So it sounds like the reason they are bad is more to do with the person who used it incorrectly and then blamed the filter as bad rather than the filter itself.

So I dunno?

Just trying to get a real world idea on these filters.

I am up for a filter already so I need to make a decision and go buy one.

Edited by Wreckage (08/09/17 12:16 AM)

#4483243 - 08/09/17 12:22 AM Re: K&N Air Filter [Re: Wreckage]
TheKracken Offline

Registered: 04/18/17
Posts: 515
Loc: Fort Worth TX
I like my KN FIPK on my truck. I run a KN in most of my vehicles I have owned currently and in the past, I have noticed good results as well as nutral, never anything bad.
2011 Prius 96k miles RLI 5w20
97 Toy T100 4x4: amsoil 0w20 242k Miles
04 Toy Sienna awd: Pennzoil 0w20 281k Miles

#4483246 - 08/09/17 12:27 AM Re: K&N Air Filter [Re: Wreckage]
Kool1 Offline

Registered: 01/25/13
Posts: 906
Loc: California
Some people will say K&N is only a rock catcher and some will say it made my engine have more power. I believe, to some extent, that there is truth to both of those viewpoints. I have a K&N FIPK on my CRV and can say it stopped the light pinging I got at low rpms and helped me get better mileage along with more power according to my seat of the pants dyno.

#4483247 - 08/09/17 12:28 AM Re: K&N Air Filter [Re: Wreckage]
rubberchicken Offline

Registered: 07/07/08
Posts: 399
Loc: Maryland USA
I only use one K&N and that is on my boat: the reason is that boats generally come with just a flame arrester, not a filter. The marine K&N is both a flame arrester and a filter, so essentially I added one where none existed. My understanding of the K&N is that they are not quite as good at filtering air as decent OEM air filters, and clean air is as important to engine longevity as good clean oil. If they have an exact fit for your application, and its not hugely expensive, go for it.

#4483262 - 08/09/17 02:15 AM Re: K&N Air Filter [Re: Wreckage]
maxdustington Offline

Registered: 01/21/17
Posts: 683
Loc: Toronna
If it's just a drop in filter, why even bother? The difference will be miniscule.
If you're buying the CAI system, you could build it yourself and use any filter you desire.

Either way, I would definitely look at the AEM reusable filters over the K&N. K&Ns are for casual car enthusiasts, AEM is for hardcore BITOG automotive nerds.
03 Jetta AWP/09A 200k kms
Edge 0W40 + Mann 719/30

#4483298 - 08/09/17 05:06 AM Re: K&N Air Filter [Re: Wreckage]
Silk Offline

Registered: 07/26/03
Posts: 4566
Loc: New Zealand
For a Surf ? Petrol or diesel ?

They seem to hate them here, but I think it's improper fitting, too much cleaning and interfering. K&N say 50,000 miles between cleaning, that's about right in my book. I've never fitted one to an injected vehicle, I usually fit them because of modifications or unavailability.

On a recent K&N bashing thread I posted photos of my clean airbox and carbs and hardly dirty K&N after being untouched for 5 years...they ignored it and carried on bashing. You won't improve power or economy.
1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.

#4483304 - 08/09/17 05:27 AM Re: K&N Air Filter [Re: Wreckage]
ltslimjim Offline

Registered: 08/06/10
Posts: 5642
Loc: WatUpDoc
I converted to aFe Pro Dry S instead of the K&N "oil required" filter media. I was blown away at the difference in media quality. I like aFe since they offer drop-in replacements for stock intakes on many engines. I'd be willing to try AEM dry flow or the aFe ProGuard7 if I went to an aftermarket intake with cone filter otherwise.
92 Civic Hatch (stolen frown RIP)
07 Honda Fit Sport (A/T) WELCOME thumbsup

#4483308 - 08/09/17 05:45 AM Re: K&N Air Filter [Re: Wreckage]
tc1446 Offline

Registered: 12/10/10
Posts: 952
Loc: Lexington, NC
I have a nice clean K&N used in my Ford Ranger for a brief time that anyone can have free for price of shipping. I think about all Rangers used the same filter but if you look up K&N for a 2000 ranger you'll know what it is. Its out in the shop so I don't know the number. I've made this same offer before with no takers.

FWIW, there was a test done long ago with K&N, paper, sponge; paper came out best. Makes sense to me that the porosity of the K&N, necessary to allow more air thru, will also let more dust thru. Each person must make the decision that suits them.

Edited by tc1446 (08/09/17 05:48 AM)
'13 Accord EX-L 2.4L (100K) M1 & FU
'00 Ford Ranger 4.0L {65K} M1 & FU
'18 Polaris Slingshot 2.4L GM
'07 Kioti CK-30

#4483315 - 08/09/17 06:06 AM Re: K&N Air Filter [Re: Wreckage]
Merkava_4 Offline

Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
You don't even have to keep them cleaned and oiled--the dirt falls right off of them.

I ran an AirRaid filter in my car for 5 years, it never got dirty; instead, the dirt would hit the filter and then fall off to the bottom of the filter box. I still have it--it looks like new.

Same principle as cooking pancakes on a Teflon frying pan.

#4483321 - 08/09/17 06:18 AM Re: K&N Air Filter [Re: Wreckage]
Wreckage Offline

Registered: 10/14/16
Posts: 60
Loc: Australia

So its not one of those "hey my air filter is still clean" because it let everything into the engine is it? lol

I got a 2.5L turbo 1jz-GTE motor on a toyota crown. Just wanted a good filter as i want this car long term.

#4483324 - 08/09/17 06:20 AM Re: K&N Air Filter [Re: Wreckage]
09_GXP Offline

Registered: 12/14/10
Posts: 430
Loc: Indianapolis, IN
K&N will allow more dust through that a good paper filter. Of course there are really bad paper filters and really bad aftermarket filters. But if we ignore these a K&N is not ideal for filtration. SWRI ran a test (results link below) that clearly shows K&N below other aftermarket brands. It would have been nice if they tested a paper filter as well but that was outside of their scope. If you want an aftermarket drop-in filter AEM is the way to go.

SWRI Air Filter Test
2017 Miata Global Cup Car #02 - Castol A3/B4 5w30 w/ OEM Fitler
2017 Miata RF - PP 0w20 w/ M1 Filter
2015 F-150 2.7L Ecoboost - PPPP 5w30 w/ MC

#4483327 - 08/09/17 06:23 AM Re: K&N Air Filter [Re: Wreckage]
Johnny2Bad Offline

Registered: 05/20/13
Posts: 1810
Loc: Saskatchewan, Canada
I don't think they are "bad" filters; the criticism seems more along the lines of shaming others for spending their own money. Me? It's your cash, spend it how you want.

If you have increased the stock HP by at least 20% or more, I think an aftermarket filter might be beneficial. If not, the OEM filter on modern vehicles almost certainly flows more air than your engine needs for maximum output.

Oiled filter media works perfectly well, if directions are followed. Note that a slightly dirty engine intake filter traps smaller particles than a perfectly clean one (the accumulated dirt acts as a finer filter media); many people change air filters before they should.
'57 FL Straight 50 wt
'90 Miata 1.8L w/Rotrex Supercharger [Mobil1 0W-40]
'96 Ram 1500 [3.7L Mobil1 0W-20 / 1L 15W-50]
'01 PT Cruiser [Mobil1 0W-40]

#4483333 - 08/09/17 06:30 AM Re: K&N Air Filter [Re: Wreckage]
Merkava_4 Offline

Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
And then there's that rumor that the oil flies off and contaminates the MAF sensor...

#4483343 - 08/09/17 06:41 AM Re: K&N Air Filter [Re: Wreckage]
wemay Offline

Registered: 04/04/12
Posts: 8898
Loc: Southeast Florida
I've used them on many vehicles where UOAs showed low silicon numbers.
2017 Hyundai Sonata Sport 2.4L
2013 Hyundai Santa Fe Sport 2.0T

#4483368 - 08/09/17 07:14 AM Re: K&N Air Filter [Re: Merkava_4]
HemiHawk Offline

Registered: 03/09/16
Posts: 842
Loc: PA,US
Originally Posted By: Merkava_4
And then there's that rumor that the oil flies off and contaminates the MAF sensor...

I've never had this issue with a NEW filter, but I once over oiled the filter after cleaning it and it surely did coat my MAF sensor.
2016 Nissan Frontier Pro4x
2017 VW GTI sport
1997 Jeep GC 4.0

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