Welcome to the North American Subaru Impreza Owners Club Friday April 18, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 01-13-2005, 12:04 AM   #1
Meat-Head-h
Scooby Newbie
 
Member#: 36957
Join Date: May 2003
Default Should I change my air filter now?

My car ('02 WRX wagon) just hit 35k miles, and I haven't changed the air filter on it to date. Should I change my air filter now? And if I should, should I purchase a K&N filter instead of another stock one?
* Registered users of the site do not see these ads.
Meat-Head-h is offline   Reply With Quote
Old 01-13-2005, 12:07 AM   #2
gjhsu
Scooby Guru
 
Member#: 12329
Join Date: Nov 2001
Chapter/Region: TXIC
Location: Austin, TX
Vehicle:
2oo7 R56 mcs
Blue, but not WRB

Default

stock ones are fine, and yeah, go ahead and chage it. I thought air filters were slated for every 15k.
gjhsu is offline   Reply With Quote
Old 01-13-2005, 12:09 AM   #3
Meat-Head-h
Scooby Newbie
 
Member#: 36957
Join Date: May 2003
Default

Would I notice any sound or performance difference if I go with the K&N filter?
Meat-Head-h is offline   Reply With Quote
Old 01-13-2005, 12:13 AM   #4
powerslide23
Scooby Specialist
 
Member#: 61956
Join Date: May 2004
Location: SoCal
Vehicle:
2008 Tribeca
Pearl White Metallic

Default

You will hear more sound (snort) and your butt dyno might feel a little power.
powerslide23 is offline   Reply With Quote
Old 01-13-2005, 12:20 AM   #5
Meat-Head-h
Scooby Newbie
 
Member#: 36957
Join Date: May 2003
Default

Another question, what is the model number for the filter for a '02 WRX.

I searched and I came up with many results, somepeople say 33-2031-2, others say 33-2075, and on the official K&N website it says 33-2232.

I am confused.
Meat-Head-h is offline   Reply With Quote
Old 01-13-2005, 07:10 AM   #6
doobie
Scooby Specialist
 
Member#: 6570
Join Date: May 2001
Chapter/Region: South East
Location: Dunedin, FL
Vehicle:
04 WRXSW
9.3 TRB0 CNV

Default

That filter is gonna be real dirty. I change mine every 7,500 miles and am continually suprised about how dirty it is. Stay with the stock one, the oil in the K&N can foul the MAF sensor.

Steve
doobie is offline   Reply With Quote
Old 01-13-2005, 09:34 AM   #7
Hayes
Scooby Specialist
 
Member#: 11808
Join Date: Oct 2001
Location: Cape Coral,FL
Default

I change mine per schedual at ~30,000 miles and still looks good. I stick with the OEM or Purolator. K&M lets more dirt in for a miniscule power gain at the top end only and is a mess to recharge. ed
Hayes is offline   Reply With Quote
Old 01-13-2005, 09:37 AM   #8
subieworx
Scooby Guru
 
Member#: 47769
Join Date: Nov 2003
Chapter/Region: MWSOC
Default

You won't feel a think with just an aftermarket panel filter. Not worth the money.
subieworx is offline   Reply With Quote
Old 01-13-2005, 09:42 AM   #9
z&cobb
Scooby Specialist
 
Member#: 12344
Join Date: Nov 2001
Chapter/Region: MAIC
Location: Mountains of Maryland
Vehicle:
2002 2JC
blue

Default

If you have $ to burn you can put in the "for offroad use" only STI air filter. I have no idea if it improves filtration or airflow, and no knowledge of demonstrated increased torque/HP under controlled conditions. The good thing is it is not oiled. The bad thing is it is not meant to be cleaned and reused. Subaruparts.com carries it.
z&cobb is offline   Reply With Quote
Old 01-13-2005, 12:54 PM   #10
Malik
Scooby Newbie
 
Member#: 29272
Join Date: Nov 2002
Chapter/Region: TXIC
Location: Houston, TX
Vehicle:
2002 WRX Wagon
Blue

Default

The K&N is worth it for the long run if you are careful about the oil. I have had issues with the oil from a K&N filter fouling the MAF (factory oiled and blotted several times before install) and reverted to the stock filter for greater peace of mind (given that I am lazy!).
Malik is offline   Reply With Quote
Old 01-13-2005, 02:35 PM   #11
Meat-Head-h
Scooby Newbie
 
Member#: 36957
Join Date: May 2003
Default

I just bought and installed the K&N filter. It was easy. The filter I bought was pre-oiled.
Meat-Head-h is offline   Reply With Quote
Old 01-13-2005, 02:51 PM   #12
mbiker97
Scooby Guru
 
Member#: 7922
Join Date: Jun 2001
Chapter/Region: MWSOC
Location: Tucson
Vehicle:
04 CTS-V b/b/b
99 GMC Highrider

Default

Go buy another stock filter. If you look at the cost difference the paper filters are the way to go ($12 for paper or $45 for K&N + $10 for ea recharge kits).
mbiker97 is offline   Reply With Quote
Old 01-13-2005, 02:53 PM   #13
zinc99
Banned
 
Member#: 56030
Join Date: Feb 2004
Location: Long Beach, CA
Vehicle:
02 stage 2 wagon
Silver

Default

But an K&N recharge kit will last about 3 cleanings.
zinc99 is offline   Reply With Quote
Old 01-13-2005, 02:56 PM   #14
Leadfoot77
Scooby Specialist
 
Member#: 74268
Join Date: Nov 2004
Chapter/Region: NESIC
Location: Boston, MA
Vehicle:
2013 STi
DGM

Default

with the K&N it's true you can get oil on the MAF sensor but you can clean this off - VERRRRY gently.
Leadfoot77 is offline   Reply With Quote
Old 01-13-2005, 02:59 PM   #15
Leadfoot77
Scooby Specialist
 
Member#: 74268
Join Date: Nov 2004
Chapter/Region: NESIC
Location: Boston, MA
Vehicle:
2013 STi
DGM

Default

Quote:
Originally Posted by mbiker97
Go buy another stock filter. If you look at the cost difference the paper filters are the way to go ($12 for paper or $45 for K&N + $10 for ea recharge kits).
but I think you only need to re-oil the K&N every 100k miles (iirc)

$12 per paper * 13 times in 100k = 160 > 45+10
Leadfoot77 is offline   Reply With Quote
Old 01-13-2005, 03:01 PM   #16
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

The stock filter will cause no problems and filter as well or better than any aftermarket filter.
The only real reason to use anything else is if you aren't using the stock airbox.

And beware the oiled filters....they have caused many here to chase their tails looking for the cause of engine issues....
Uncle Scotty is offline   Reply With Quote
Old 01-13-2005, 03:02 PM   #17
subenerd
Scooby Specialist
 
Member#: 72630
Join Date: Oct 2004
Location: CA
Vehicle:
2004 STi

Default

My first change was at 30K and it was FILTHY! I will change mine sooner next time
subenerd is offline   Reply With Quote
Old 01-13-2005, 03:33 PM   #18
mbiker97
Scooby Guru
 
Member#: 7922
Join Date: Jun 2001
Chapter/Region: MWSOC
Location: Tucson
Vehicle:
04 CTS-V b/b/b
99 GMC Highrider

Default

Quote:
Originally Posted by Leadfoot77
but I think you only need to re-oil the K&N every 100k miles (iirc)

$12 per paper * 13 times in 100k = 160 > 45+10
You need to clean the K&N just as much as you replace a standard filter.

I usually got 2 cleanings/re-oiling out of a recharge kit.
mbiker97 is offline   Reply With Quote
Old 01-13-2005, 04:21 PM   #19
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

Quote:
Originally Posted by mbiker97
I usually got 2 cleanings/re-oiling out of a recharge kit.
Uncle Scotty is offline   Reply With Quote
Old 01-13-2005, 04:26 PM   #20
zinc99
Banned
 
Member#: 56030
Join Date: Feb 2004
Location: Long Beach, CA
Vehicle:
02 stage 2 wagon
Silver

Default

If you dont get at least 2 cleanings you are using way too much oil. You are just to get the cotton red not saturated in oil. Also always apply the oil in the direction of the air and not on the back so it will stay in the cotton and not go into the MAF.
zinc99 is offline   Reply With Quote
Old 01-13-2005, 04:54 PM   #21
Meat-Head-h
Scooby Newbie
 
Member#: 36957
Join Date: May 2003
Default

Quote:
Originally Posted by zinc99
If you dont get at least 2 cleanings you are using way too much oil. You are just to get the cotton red not saturated in oil. Also always apply the oil in the direction of the air and not on the back so it will stay in the cotton and not go into the MAF.
The instructions say to oil both sides though.
Meat-Head-h is offline   Reply With Quote
Old 01-13-2005, 05:06 PM   #22
Leadfoot77
Scooby Specialist
 
Member#: 74268
Join Date: Nov 2004
Chapter/Region: NESIC
Location: Boston, MA
Vehicle:
2013 STi
DGM

Default

Quote:
Originally Posted by Meat-Head-h
The instructions say to oil both sides though.
IIRC it's just one side like zinc said I'm and POSITIVE you don't have to re-oil it as often as you change the paper filter. IIRC the manufacturer advertises reoiling at 100k but I think typically you'd want to clean it slightly more often than that. 2 cleanings per recharge kit is ridonkulous.
Leadfoot77 is offline   Reply With Quote
Old 01-13-2005, 05:26 PM   #23
Filanwizard
Scooby Newbie
 
Member#: 78643
Join Date: Jan 2005
Location: Danbury, CT
Vehicle:
1995 Chevy S10 4x4
Teal Green

Default

wow 15k for an air filter, and here for years i was allways told you change them every oil change.
Filanwizard is offline   Reply With Quote
Old 01-13-2005, 05:38 PM   #24
brunetmj
Scooby Specialist
 
Member#: 8023
Join Date: Jul 2001
Location: Way-upstate , NY
Vehicle:
2004 2.5 RS

Default

Quote:
wow 15k for an air filter, and here for years i was allways told you change them every oil change.
Much depends on environmental conditions. If it's dirty change it. Perhaps what you were told was to check it every oil change? Now when I used synthetic oils and had low travel mileage I changed the filter when I changed the oil.
brunetmj is offline   Reply With Quote
Old 01-13-2005, 06:48 PM   #25
mbiker97
Scooby Guru
 
Member#: 7922
Join Date: Jun 2001
Chapter/Region: MWSOC
Location: Tucson
Vehicle:
04 CTS-V b/b/b
99 GMC Highrider

Default

Quote:
Originally Posted by Uncle Scotty
I always had a ton of oil left over. It was the cleaner that ran out.
mbiker97 is offline   Reply With Quote
Reply

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Changed my driving routine, how often should I change my oil? eurospek Service & Maintenance 8 11-04-2009 09:57 PM
How much power can I expect to gain by changing my air filters? Malasubidude Newbies & FAQs 17 07-16-2008 12:54 PM
How often should I clean my air filter? Jay04WRX Service & Maintenance 9 08-17-2005 04:13 PM
when should i change the air filter?? lik Vancouver Impreza Club Forum -- VIC 12 05-14-2003 05:12 PM
Should I change my oil now or later? Penphoe Normally Aspirated Powertrain 6 09-03-2001 01:07 PM


All times are GMT -4. The time now is 10:42 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.