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Re: Project Farm Air Filter Test! [Re: Kage860] #5373000 03/10/20 10:12 PM
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gathermewool Offline
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Decided to return the Fram Extra Guard and buy Fram Ultra filters for a little more than double the price at Walmart.

Surprisingly, the Ultra is a little larger than the Extra and matches the OE Denso dimensions exactly. I’ll post more tomorrow.


14 Forester XT Touring FA20DIT (Cobb Stage 1)
Castrol Magnatec 5W-30 D1G2 + FU filter (2nd OFI) (77,760mi, 3/7/20)
15 Legacy Premium FB25
Magnatec 0W-20 D1G2+ FU filter (2nd OFI) (54,621mi, 3/4/20)
Re: Project Farm Air Filter Test! [Re: gathermewool] #5373131 03/11/20 06:20 AM
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TiGeo Offline
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Originally Posted by gathermewool
Originally Posted by TiGeo
Originally Posted by metroplex
Originally Posted by TiGeo
It's a cool test/setup he did...straightforward. Results of course make sense - flow and filtering are inversely proportional. I use a K&N and am glad I don't dump flower on top of it...hahahaha It's a good test but the real-world conditions I drive in are quite a bit different. My UOAs always look fine and my intake track behind the filter is always clean to the touch so clearly, while not filtering as well as a paper filter (duh) it does well enough for me. Also, I dig the 0-60 runs - the K&N works, it's not BS and for those of us tuning/trying to extract as much as we can out of our cars, it matters.


On a N/A engine, the K&N can help with that 0.1 psi reduction in pressure drop. But on a turbocharged application like a tuned Ford EcoBoost, that 0.1 psi delta in pressure drop is negligible.


It was a bit more than 0.1 pressure drop.



Nope. The difference between the highest vacuum (inches of water) to no filter is about 0.1 psid.


Units. Got it.


2018 VW Atlas SEL 4Motion 3.6 - Castrol OE 5W40 VW filter
2018 VW GSW S 4Motion 1.8 Unitronic St2 IS20 - LiquiMoly 5W40 VW filter+Ceratec/MoS2
2013 Ford Focus SE HB 2.0 - MC syn-blend 5W20 MC filter
Re: Project Farm Air Filter Test! [Re: Kage860] #5373176 03/11/20 07:39 AM
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doitmyself Offline
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With any manufacturer, I wonder how much they use the same media across their line up. We know that most of the manufacturers have a good number of filters that they source from other companies and/or countries.

My point is, I wonder if my WIX round, barrel shaped filter has the same media as the panel filter that Project Farm tested.

Re: Project Farm Air Filter Test! [Re: doitmyself] #5373412 03/11/20 12:48 PM
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gathermewool Offline
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Originally Posted by doitmyself
With any manufacturer, I wonder how much they use the same media across their line up. We know that most of the manufacturers have a good number of filters that they source from other companies and/or countries.

My point is, I wonder if my WIX round, barrel shaped filter has the same media as the panel filter that Project Farm tested.


It would make financial sense for them to spread out the use of same or similar media as much as possible.


14 Forester XT Touring FA20DIT (Cobb Stage 1)
Castrol Magnatec 5W-30 D1G2 + FU filter (2nd OFI) (77,760mi, 3/7/20)
15 Legacy Premium FB25
Magnatec 0W-20 D1G2+ FU filter (2nd OFI) (54,621mi, 3/4/20)
Re: Project Farm Air Filter Test! [Re: gathermewool] #5373579 03/11/20 04:02 PM
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bulwnkl Offline
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Originally Posted by gathermewool


It would make financial sense for them to spread out the use of same or similar media as much as possible.


For those they manufacture themselves in the same facility it may, but for contract-built filters that’s not applicable.


I use speech recognition frequently. Please excuse any consequent grammatical or typographical errors.
Re: Project Farm Air Filter Test! [Re: bulwnkl] #5373635 03/11/20 05:05 PM
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CR94 Offline
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Originally Posted by bulwnkl
Originally Posted by gathermewool
It would make financial sense for them to spread out the use of same or similar media as much as possible.
For those they manufacture themselves in the same facility it may, but for contract-built filters that’s not applicable.
Perhaps, but Fram, for example, makes the same efficiency claim for its Chinese-contracted oil filter cartridges as for US-built spin-ons. Maybe they use the same media grade, shipped to the contract manufacturer? Likely similar plan for air filters?

Last edited by CR94; 03/11/20 05:07 PM.

2011 Toyota Prius now at 110K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K
Re: Project Farm Air Filter Test! [Re: TiGeo] #5374274 03/12/20 08:47 AM
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circuitsmith Offline
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Originally Posted by TiGeo
If you look at "real" testing data, the efficiency difference is about 3% lower (~96
% vs. ~99%) vs. the paper filters,

Another way to look at it is that the K&N lets 4X the dirt through: 4% vs 1%.


2017 Hyundai Tucson SE FWD
SuperTech synth, 5w-30, 5000mi/12mo OCI
Re: Project Farm Air Filter Test! [Re: Kage860] #5374287 03/12/20 09:01 AM
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Olas Offline
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Ive heard it suggested that the cotton fibres of a K&N filter 'wave about' in the airflowand it is this waving that allows them to capture more dirt.
He referred to it as electrostatic attraction, I think.

Re: Project Farm Air Filter Test! [Re: bulwnkl] #5374501 03/12/20 01:02 PM
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gathermewool Offline
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Originally Posted by bulwnkl
Originally Posted by gathermewool


It would make financial sense for them to spread out the use of same or similar media as much as possible.


For those they manufacture themselves in the same facility it may, but for contract-built filters that’s not applicable.


How so? Honest question - I’m probably just being dense.


14 Forester XT Touring FA20DIT (Cobb Stage 1)
Castrol Magnatec 5W-30 D1G2 + FU filter (2nd OFI) (77,760mi, 3/7/20)
15 Legacy Premium FB25
Magnatec 0W-20 D1G2+ FU filter (2nd OFI) (54,621mi, 3/4/20)
Re: Project Farm Air Filter Test! [Re: Olas] #5374540 03/12/20 01:40 PM
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wemay Online Happy
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Originally Posted by Olas
Ive heard it suggested that the cotton fibres of a K&N filter 'wave about' in the airflowand it is this waving that allows them to capture more dirt.
He referred to it as electrostatic attraction, I think.


I can't see this being the case. The fibers are pressed between two wire meshes. The construction is very solid. The more i think of this test the more i wonder the significance of flour as related to actual road-born particles. I'm one of those that's used K&N in many vehicles without issue (consumption issues or otherwise). I still know that a quality paper filter will 'filter' better. That's not up for debate.


2019 Volkswagen Passat Wolfsburg TSI: OE VW508.00 0W-20, OE filter
2013 Hyundai Santa Fe Sport 2.0T: RGT 5W-30, OE oil filter
Re: Project Farm Air Filter Test! [Re: Kage860] #5374984 03/12/20 09:23 PM
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Mike L. V. Offline
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4x the dirt at 4x the cost and the cleaning/oil kit costs another $10-$15. I'll stick to paper filters. Wix, Napa Gold, OEM. If I can see light pass through the washable air screens I can imagine the dust it's passing.

I used K&N and Green Filters in the past and after seeing the intake tube dusting they caused in my applications every 10K I threw them in the trash and went back to paper.

If they work in your applications use em.

Re: Project Farm Air Filter Test! [Re: Kage860] #5375146 03/13/20 06:48 AM
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wemay Online Happy
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Nope, not all K&N are 4x the cost. Mine was $47. The paper filters run for $20. The cleaning/reoiling kit I have is still good after 8 years which is when I bought it for another vehicle. Never had a dusted intake tract.


2019 Volkswagen Passat Wolfsburg TSI: OE VW508.00 0W-20, OE filter
2013 Hyundai Santa Fe Sport 2.0T: RGT 5W-30, OE oil filter
Re: Project Farm Air Filter Test! [Re: wemay] #5375189 03/13/20 07:25 AM
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Mike L. V. Offline
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Originally Posted by wemay
Nope, not all K&N are 4x the cost. Mine was $47. The paper filters run for $20. The cleaning/reoiling kit I have is still good after 8 years which is when I bought it for another vehicle. Never had a dusted intake tract.


My application was 4x the cost. I live near the beach so sand and dust was a huge issue. If a K&N works for you go for it. I just said I wouldn't use them.

Re: Project Farm Air Filter Test! [Re: Mike L. V.] #5375398 03/13/20 10:43 AM
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wemay Online Happy
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Originally Posted by Mike L. V.
Originally Posted by wemay
Nope, not all K&N are 4x the cost. Mine was $47. The paper filters run for $20. The cleaning/reoiling kit I have is still good after 8 years which is when I bought it for another vehicle. Never had a dusted intake tract.


My application was 4x the cost. I live near the beach so sand and dust was a huge issue. If a K&N works for you go for it. I just said I wouldn't use them.


Yeah, i got it cheers I was offering a counter point of view. But i understand your reasoning completely.


2019 Volkswagen Passat Wolfsburg TSI: OE VW508.00 0W-20, OE filter
2013 Hyundai Santa Fe Sport 2.0T: RGT 5W-30, OE oil filter
Re: Project Farm Air Filter Test! [Re: shrooms] #5375446 03/13/20 12:05 PM
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volk06 Offline
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Originally Posted by shrooms
I believe Supetech is made by Purolator.


Supertech is made by Champion. Even says right on the website.

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