K&N Air Filters - Worth the Money? - Fuelly Forums
Go Back   Fuelly Forums > Tech, Troubleshooting and Repair > General Maintenance and Repair
Search Today's Posts Mark Forums Read
Thread Tools Display Modes
Old 03-17-2008, 06:48 PM   #1
Registered Member
Join Date: Feb 2008
Posts: 24
Country: United States
Send a message via Yahoo to Scott_in_Tulsa
Question K&N Air Filters - Worth the Money?

Hi to the group!

I just wanted to see what the general consensus is on adding a K&N air filter to a auto vehicle to help improve gas mileage. Is it really worth the money?

I have a 2000 Honda Civic EX w/ auto trans and am trying to squeeze every mile I can out of each tank of gas. If it only helps .1 mpg, I am not sure it is worth it. If the change is sufficiently higher than that, I am all ears.

Let me know. Just wanted some wise advice from the group before I go down this road.


Scott in Tulsa
Scott_in_Tulsa is offline   Reply With Quote
Old 03-17-2008, 06:56 PM   #2
Registered Member
Join Date: Apr 2007
Posts: 336
Country: United States
yes! its worth its weight in gold. all you need is the recharger kit for 10 bucks and your good to go for a long time....

civic94 is offline   Reply With Quote
Old 03-17-2008, 06:56 PM   #3
Registered Member
kamesama980's Avatar
Join Date: Nov 2007
Posts: 742
Country: United States
Location: Columbus, IN, USA
Send a message via AIM to kamesama980 Send a message via Yahoo to kamesama980

been covered. done PROPERLY (right amount of oil) it's at most 1-2 mpg gain. get too little oil and there's almost no filtration ability. too much oil and nothing will happen except an oily intake pipe. If you have a MAF sensor, too much oil can mess it up... occasionally permanently.
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"
kamesama980 is offline   Reply With Quote
Old 03-17-2008, 07:13 PM   #4
Registered Member
Join Date: Dec 2007
Posts: 170
Country: United States
The short answer is a definite YES.
Proper lubrication as already stated is the key.
Too much oil and the oxy sensor won't talk to you any more either.

Cheers , Pete.
GasSavers_Pete is offline   Reply With Quote
Old 03-17-2008, 07:39 PM   #5
Registered Member
GasSavers_RoadWarrior's Avatar
Join Date: Feb 2008
Posts: 1,652
IMO, they should be well sorted for Civics, for other models, do your research, some applications don't flow as well as good paper filters. If there isn't a "performance" application for the filter, i.e. there is no performance model in the line-up that that filter fits, or no large following of modders for that model, then I'd be inclined to be skeptical about them. I have a theory that the Fram Airhog's should be better for these models, due to expecting that Fram know what their paper filters flow, and make the airhogs flow better. Whereas K&N doesn't seem to do as best they can for non-performance models unless nagged by enthusiast groups. However, Fram seem like they have given up on the airhog line, and they may be hard to find. I know Fram has a bad rap for oil filters, but I've always found their air filters decent. Well the normal ones, not so impressed with the new heavy duty one. Anyhoo, what led me to these opinions in part was that the K&N panel filter is regarded by Escort enthusiasts as being useless, whereas I have been rather impressed by the airhog I got for mine. K&Ns are also regarded as tame for mopar 3.0 V6 applications, so I was eager to get an airhog for Marvin, but have been having trouble finding them in stock anywhere.

So any model that K&N really has put performance development time into may be superior to airhogs, but models they have neglected may fare better with airhogs.
I remember The RoadWarrior..To understand who he was, you have to go back to another time..the world was powered by the black fuel & the desert sprouted great cities..Gone now, swept away..two mighty warrior tribes went to war & touched off a blaze which engulfed them all. Without fuel, they were nothing..thundering machines sputtered & stopped..Only those mobile enough to scavenge, brutal enough to pillage would survive. The gangs took over the highways, ready to wage war for a tank of juice
GasSavers_RoadWarrior is offline   Reply With Quote
Old 03-18-2008, 04:27 AM   #6
Registered Member
Join Date: Apr 2007
Posts: 290
Country: United States
kamesama980 made a good point. If you value your MAF sensor (and in all honesty, you SHOULD value it A LOT), then you shouldn't mess with the K&N. Lots of guys over on the tdi club forums either a) didn't hear this advice or b) went against it. They sure paid in the end -- about $200 for a new sensor. Now, not all cars are prone to this kind of problem, but I personally would never let one of those things near my car.

www.bobistheoilguy.com has an excellent rundown of air filters. Basically (if I am remembering correctly), they found that the K&N provided both fairly bad air flow and terrible filtration. As in, tons of sediment will go RIGHT past it, and straight into your beloved engine. That, and filters really don't have all that much to do with FE. Change it on schedule and you will never see a difference.
Erdrick is offline   Reply With Quote
Old 03-18-2008, 05:55 AM   #7
Registered Member
GasSavers_Ryland's Avatar
Join Date: Mar 2006
Posts: 1,325
Country: United States
Send a message via AIM to GasSavers_Ryland
I've had bad luck with them, even after oiling them with the high tack oil they still let alot of dirt thru, so I switched to foam filters, they alow simaler air flow, but stop more dirt, I give my foam filter credit for my car having 250,000 miles and perfect compresion.
GasSavers_Ryland is offline   Reply With Quote
Old 03-18-2008, 07:10 AM   #8
Join Date: Jul 2010
Posts: 39
Country: United States
Location: California
I picked up a K&N air filter from autoanything for my 95 Civic EX for $35. For the price compared to a fram filter (which I heard was horrible and at one point used to be rated highly by Consumer Reports) it was about 3x more. It seems one of the selling points of the K&N is the fact that it'll last for your vehicle's lifetime. You would be making up the costs in 3 air filter changes. I've also heard about the damage from MAF sensors and that can also be contributed to a customer using excessive oil when "recharging" the filter. K&N's response: http://www.knfilters.com/MAF/massair.htm

As far as any gains in MPG, it's hard for me to tell at this point. I have too many variables in place that change my overall mileage and I unfortunately won't be able to perform any type of controlled testing in the future. If the scan gauge was compatible with my car I might be able to provide more info but so far I haven't had any issues. One of my friends uses it in his 1998 Civic EX with no issues. He's also not running stock parts (turbo engine, etc.).
KrazyDawg is offline   Reply With Quote
Old 03-18-2008, 08:16 AM   #9
Registered Member
Join Date: Nov 2005
Posts: 331
Country: United States
Send a message via MSN to n0rt0npr0
I second everything Erdrick said above. Bad filtration especially (which means that IF you live in the midwest all that SALT is gonna get in your engine and into your oil, think about the ACIDS that will be created eating your engine from the inside out!)
"You have to know the truth, and seek the truth, and the truth will set you free."
n0rt0npr0 is offline   Reply With Quote
Old 03-18-2008, 01:19 PM   #10
Senior Member
Mayhim's Avatar
Join Date: Jun 2012
Posts: 179
Country: United States
I used a K&N filter in my Z28. I couldn't say there was much of a change in F.E. from it.

I had some oil analysis' done while I had the K&N filter in place. The silicon (dirt) infiltration was no greater than with stock paper filters. No difference on my car at all. Perhaps the issue was not with the K&N but with how it fits into particular intake structures. Mine came with a gasket to make the fit proper. Others might be better/worse than stock paper filters in the fit for a particular use.

The instructions describe in detail how much to oil the filter media. In this case it is bad to be one of the more-is-always-better crowd. Simply follow the instructions.

Mayhim is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Incorrect Milage Calcuatlion PatM Fuelly Web Support and Community News 4 07-17-2009 07:21 PM
Mobile fuelly not working on Blackberry mongoandjane Fuelly Web Support and Community News 3 05-13-2009 11:52 AM
Gallons per Mile? nerb Fuelly Web Support and Community News 1 11-12-2008 03:33 AM
Grille blocking jcp123 General Fuel Topics 15 06-09-2008 04:03 PM
Throttle spring...pedal vs RPM? ZugyNA General Fuel Topics 17 08-01-2006 04:17 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 11:04 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.