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#4725192 - 04/12/18 09:22 PM Tried WD40 on a paper air filter
Number_35 Offline


Registered: 07/07/14
Posts: 841
Loc: 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?

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#4725197 - 04/12/18 09:28 PM Re: Tried WD40 on a paper air filter [Re: Number_35]
maverickfhs Offline


Registered: 12/28/16
Posts: 2076
Loc: 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.
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#4725224 - 04/12/18 10:22 PM Re: Tried WD40 on a paper air filter [Re: Number_35]
Rolla07 Offline


Registered: 11/05/11
Posts: 4755
Loc: MTL, CANADA
It pulls in the wd40 and creates a film on the MAF sensor. Dry filters work just fine smile
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#4725236 - 04/12/18 10:29 PM Re: Tried WD40 on a paper air filter [Re: Number_35]
gathermewool Offline


Registered: 01/09/09
Posts: 6064
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'.

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#4725244 - 04/12/18 10:36 PM Re: Tried WD40 on a paper air filter [Re: Number_35]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1911
Loc: SE British Columbia, Canada
But thanks for sharing.

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#4725258 - 04/12/18 10:54 PM Re: Tried WD40 on a paper air filter [Re: maverickfhs]
wemay Offline


Registered: 04/04/12
Posts: 9001
Loc: Southeast Florida
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.
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#4725298 - 04/13/18 12:03 AM Re: Tried WD40 on a paper air filter [Re: gathermewool]
Ducked Offline


Registered: 10/25/12
Posts: 4432
Loc: 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.

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#4725305 - 04/13/18 12:35 AM Re: Tried WD40 on a paper air filter [Re: Number_35]
Lolvoguy Offline


Registered: 02/06/14
Posts: 2394
Loc: 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
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#4725415 - 04/13/18 07:26 AM Re: Tried WD40 on a paper air filter [Re: Number_35]
Rand Offline


Registered: 08/20/03
Posts: 12740
Loc: NE,Ohio
There are fram paper filters that come oiled. I'm guessing the oil is more tacky... less solvents.
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#4725520 - 04/13/18 08:57 AM Re: Tried WD40 on a paper air filter [Re: Number_35]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 12037
Loc: 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!
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#4725668 - 04/13/18 11:06 AM Re: Tried WD40 on a paper air filter [Re: Ducked]
gathermewool Offline


Registered: 01/09/09
Posts: 6064
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.


Iím 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?

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#4725892 - 04/13/18 03:17 PM Re: Tried WD40 on a paper air filter [Re: Number_35]
Yah-Tah-Hey Online   content


Registered: 05/26/14
Posts: 3492
Loc: Columbus,Nebraska
WHY?

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#4726158 - 04/13/18 07:56 PM Re: Tried WD40 on a paper air filter [Re: gathermewool]
Ducked Offline


Registered: 10/25/12
Posts: 4432
Loc: 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.


Iím 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.


Edited by Ducked (04/13/18 08:13 PM)

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#4728032 - 04/15/18 05:19 PM Re: Tried WD40 on a paper air filter [Re: Ducked]
gathermewool Offline


Registered: 01/09/09
Posts: 6064
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.


Iím 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.

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#4728305 - 04/15/18 09:15 PM Re: Tried WD40 on a paper air filter [Re: gathermewool]
cheesepuffs Offline


Registered: 09/24/13
Posts: 580
Loc: 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.


Iím 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.
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