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Tried WD40 on a paper air filter #4725192
04/12/18 09:22 PM
04/12/18 09:22 PM
Joined: Jul 2014
Posts: 969
Winnipeg MB CA
Number_35 Offline OP
Number_35  Offline OP
Joined: Jul 2014
Posts: 969
Winnipeg MB CA
Saw a YouTube video last Fall, regarding spraying the intake air side of an automotive dry air filter with WD40 to increase the filter's efficiency.

I tried it, and, after a few weeks, got an OBD II P0101 code. Cleared the code several times, but it always came back within minutes of driving. One possible cause is contamination of the MAF sensor. I ran half a spray can through yesterday, and then cleared the code. So far so good.

I don't think I'll try this again. blush

Has anyone else tried this, and did you have a similar experience?

Re: Tried WD40 on a paper air filter [Re: Number_35] #4725197
04/12/18 09:28 PM
04/12/18 09:28 PM
Joined: Dec 2016
Posts: 2,177
VA
maverickfhs Offline
maverickfhs  Offline
Joined: Dec 2016
Posts: 2,177
VA
I personally would not do it. Probably that's why I have never installed a K&N air filter.

Except on motorcycles with carbs and no ECU's.

I have read MAF can be extremely sensitive to contaminants.

Hopefully it won't come back again.


2006 Civic EX 202K/AT
2006 Acura TSX 180K/AT
Re: Tried WD40 on a paper air filter [Re: Number_35] #4725224
04/12/18 10:22 PM
04/12/18 10:22 PM
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Rolla07 Offline
Rolla07  Offline
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
It pulls in the wd40 and creates a film on the MAF sensor. Dry filters work just fine smile


2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967

Re: Tried WD40 on a paper air filter [Re: Number_35] #4725236
04/12/18 10:29 PM
04/12/18 10:29 PM
Joined: Jan 2009
Posts: 6,308
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,308
New England
WD-40 isn't a lubricant. Of all the things to try on a paper filter, WD-40 would be at the bottom of my list. Actually, the first 100 things on my list to add to a paper filter are all, 'nothing at all'.


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter
Re: Tried WD40 on a paper air filter [Re: Number_35] #4725244
04/12/18 10:36 PM
04/12/18 10:36 PM
Joined: Dec 2017
Posts: 2,520
SE British Columbia, Canada
Snagglefoot Online content
Snagglefoot  Online Content
Joined: Dec 2017
Posts: 2,520
SE British Columbia, Canada
But thanks for sharing.


If you want the job done right......do it yourself.
Re: Tried WD40 on a paper air filter [Re: maverickfhs] #4725258
04/12/18 10:54 PM
04/12/18 10:54 PM
Joined: Apr 2012
Posts: 9,571
Kendall, FL
wemay Offline
wemay  Offline
Joined: Apr 2012
Posts: 9,571
Kendall, FL
Originally Posted By: maverickfhs
I personally would not do it. Probably that's why I have never installed a K&N air filter.

Except on motorcycles with carbs and no ECU's.

I have read MAF can be extremely sensitive to contaminants.

Hopefully it won't come back again.


Nothing about wd40 or paper filter resembles K&N red tacky oil or it's cotton gauze filter methodology. Weather you're a fan of them or not.


'18 Sportage LX AWD Pennzoil Platinum 5w20
'13 Santa Fe Sport 2.0T Castrol GTX Magnatec 5w30
Re: Tried WD40 on a paper air filter [Re: gathermewool] #4725298
04/13/18 12:03 AM
04/13/18 12:03 AM
Joined: Oct 2012
Posts: 4,794
Taiwan
Ducked Online content
Ducked  Online Content
Joined: Oct 2012
Posts: 4,794
Taiwan
Originally Posted By: gathermewool
WD-40 isn't a lubricant.


He wasn't using it as a lubricant, so its lubricant status isn't really relevant.

Re: Tried WD40 on a paper air filter [Re: Number_35] #4725305
04/13/18 12:35 AM
04/13/18 12:35 AM
Joined: Feb 2014
Posts: 2,529
Canada
Lolvoguy Offline
Lolvoguy  Offline
Joined: Feb 2014
Posts: 2,529
Canada
Originally Posted By: Number_35
Saw a YouTube video last Fall, regarding spraying the intake air side of an automotive dry air filter with WD40 to increase the filter's efficiency.

crzy


06 Lexus IS350- Wife
88 BMW 325is- Mistress
Re: Tried WD40 on a paper air filter [Re: Number_35] #4725415
04/13/18 07:26 AM
04/13/18 07:26 AM
Joined: Aug 2003
Posts: 12,964
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,964
NE,Ohio
There are fram paper filters that come oiled. I'm guessing the oil is more tacky... less solvents.


2019 Jeep Cherokee Trailhawk 2.0T
Re: Tried WD40 on a paper air filter [Re: Number_35] #4725520
04/13/18 08:57 AM
04/13/18 08:57 AM
Joined: May 2009
Posts: 12,250
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,250
N.H, U.S.A.
Silicone in the WD will destroy your primary oxygen sensor and make the mixture way off stoich - but set no MIL - that is until you burn the cat down.

Enjoy This!


2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter
Re: Tried WD40 on a paper air filter [Re: Ducked] #4725668
04/13/18 11:06 AM
04/13/18 11:06 AM
Joined: Jan 2009
Posts: 6,308
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,308
New England
Originally Posted By: Ducked
Originally Posted By: gathermewool
WD-40 isn't a lubricant.


He wasn't using it as a lubricant, so its lubricant status isn't really relevant.


I’m not sure he knew what he was using it for.

If you had to guess, how would you correct my statement? He was trying to remove water from the filter; light penetration; a bit of solvency-based cleaning?


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter
Re: Tried WD40 on a paper air filter [Re: Number_35] #4725892
04/13/18 03:17 PM
04/13/18 03:17 PM
Joined: May 2014
Posts: 3,723
Columbus,Nebraska
Yah-Tah-Hey Offline
Yah-Tah-Hey  Offline
Joined: May 2014
Posts: 3,723
Columbus,Nebraska
WHY?

Re: Tried WD40 on a paper air filter [Re: gathermewool] #4726158
04/13/18 07:56 PM
04/13/18 07:56 PM
Joined: Oct 2012
Posts: 4,794
Taiwan
Ducked Online content
Ducked  Online Content
Joined: Oct 2012
Posts: 4,794
Taiwan
Originally Posted By: gathermewool
Originally Posted By: Ducked
Originally Posted By: gathermewool
WD-40 isn't a lubricant.


He wasn't using it as a lubricant, so its lubricant status isn't really relevant.


I’m not sure he knew what he was using it for.

If you had to guess, how would you correct my statement? He was trying to remove water from the filter; light penetration; a bit of solvency-based cleaning?


Would have to see the video that prompted him to do it, but if I had to guess, I'd say he probably thought he was using it in the same way as oil is used on K&N filters. I don't know how that is usually described.

Tackifier? Trapping Agent? Stickyfier? They probably just call it "filter oil"

As to whether it would work in that role on a standard paper filter, dunno, but (contamination issues aside, which I wouldn't have to worry about much on my 1986 car) I don't see why not. Most of it is probably light solvent so that'll be ingested and cease to be effective quite quickly. The residue's effectiveness will depend on what it is. If its a wax it won't do much, but if its a stickier silicone oil it might be effective.

Do you gain anything? Dunno, maybe, unless the filter is already performing at 100% for all particle sizes, which is essentially impossible.

Do you lose anything? Dunno

I'd guess that optimally you'd want something heavier, and if you use a lot you'll make the filter too restrictive.

Last edited by Ducked; 04/13/18 08:13 PM.
Re: Tried WD40 on a paper air filter [Re: Ducked] #4728032
04/15/18 05:19 PM
04/15/18 05:19 PM
Joined: Jan 2009
Posts: 6,308
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,308
New England
Originally Posted By: Ducked
Originally Posted By: gathermewool
Originally Posted By: Ducked
Originally Posted By: gathermewool
WD-40 isn't a lubricant.


He wasn't using it as a lubricant, so its lubricant status isn't really relevant.


I’m not sure he knew what he was using it for.

If you had to guess, how would you correct my statement? He was trying to remove water from the filter; light penetration; a bit of solvency-based cleaning?


Would have to see the video that prompted him to do it, but if I had to guess, I'd say he probably thought he was using it in the same way as oil is used on K&N filters. I don't know how that is usually described.

Tackifier? Trapping Agent? Stickyfier? They probably just call it "filter oil"

As to whether it would work in that role on a standard paper filter, dunno, but (contamination issues aside, which I wouldn't have to worry about much on my 1986 car) I don't see why not. Most of it is probably light solvent so that'll be ingested and cease to be effective quite quickly. The residue's effectiveness will depend on what it is. If its a wax it won't do much, but if its a stickier silicone oil it might be effective.

Do you gain anything? Dunno, maybe, unless the filter is already performing at 100% for all particle sizes, which is essentially impossible.

Do you lose anything? Dunno

I'd guess that optimally you'd want something heavier, and if you use a lot you'll make the filter too restrictive.


Great response. Points taken.


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter
Re: Tried WD40 on a paper air filter [Re: gathermewool] #4728305
04/15/18 09:15 PM
04/15/18 09:15 PM
Joined: Sep 2013
Posts: 582
Connecticut
cheesepuffs Offline
cheesepuffs  Offline
Joined: Sep 2013
Posts: 582
Connecticut
Originally Posted By: gathermewool
Originally Posted By: Ducked
Originally Posted By: gathermewool
WD-40 isn't a lubricant.


He wasn't using it as a lubricant, so its lubricant status isn't really relevant.


I’m not sure he knew what he was using it for.

If you had to guess, how would you correct my statement? He was trying to remove water from the filter; light penetration; a bit of solvency-based cleaning?


He said to try to increase the filters efficiency. He was trying to use the WD-40 like a filter oil that dirt and dust would stick to.


2008 Honda Accord Coupe V6
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