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#4542640 - 10/13/17 09:18 PM Is OEM Air Filter the "BEST"?
Gebo Offline

Registered: 09/18/02
Posts: 2127
Loc: VA
Is the consensus here that OEM air filters offer the best engine protection (regardless of increased hp or torque claims)? Are OEM air filters the best at keeping out damaging particles while allowing the engine to function as it was designed to function?
'98 LEX LS400 280K
'00 LEX GS300 195K
'02 4Runner 225K
'05 Lex LS430 85K
'06 Toyota Highlander 145K
'09 Lex IS350 85K

#4542660 - 10/13/17 09:43 PM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
HangFire Offline

Registered: 08/21/13
Posts: 2506
Loc: Central Maryland
You want a consensus on EVERY OEM brand, type, year, generation of air filters? Ever?
Various musings:

#4542676 - 10/13/17 09:56 PM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
StevieC Offline

Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
I have had better UOA's with Fram paper filters than the usual cotton type media from the dealer.
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

#4542704 - 10/13/17 10:25 PM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
2015_PSD Offline

Registered: 09/26/10
Posts: 7243
Loc: SE Texas
Not from my experience with Motorcraft--WIX or NAPA Gold are light years better.
2018 MB AMG GLC43 3.0L Coupe - M1 0W-40/OEM
2018 MB C300 2.0L - M1 0W-40/OEM
2015 F-250 6.7L PS Diesel - Delo 5W-40/CQ Blue
2014 Explorer 3.5L Limited - M1 AFE 0W-20/FU

#4542705 - 10/13/17 10:27 PM Re: Is OEM Air Filter the "BEST"? [Re: HangFire]
CR94 Offline

Registered: 03/20/16
Posts: 1120
Loc: Western S.C. since 1996
Originally Posted By: HangFire
You want a consensus on EVERY OEM brand, type, year, generation of air filters? Ever?
Good point! Some OEM filters might be better than others.
2011 Toyota Prius now at 88K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K

#4542707 - 10/13/17 10:30 PM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
THafeez Offline

Registered: 08/15/16
Posts: 651
Loc: New Jersey
get an air filter gauge and you will find out.
2004 Toyota Solara SE 2.4 2AZFE
175,000 miles
Valvoline Synpower Maxlife 5W30
Royal Purple 20-400 oversize

#4542753 - 10/13/17 11:53 PM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
Pajero Offline

Registered: 05/05/12
Posts: 873
Loc: Rio Rancho, NM
For my application yes! I have purchased a dozen various brands and compared them to Mitsubishi OEM. OEM in most cases was cheaper and better quality. Although, I'm not a scientist, it's just my personal belief. I do have faith in the Japanese. Different strokes for different folks. That's what my grandfather always said.....


Always remember "Planned obsolescence."

1994 Montero SR 3.5 DOHC, 133,xxx
Fram Ultra/ Snorkel with Pre-filter

#4542772 - 10/14/17 12:25 AM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
Johnny2Bad Offline

Registered: 05/20/13
Posts: 1810
Loc: Saskatchewan, Canada
OEM filters generally will flow more air than the engine can use to make power. I'm not sure what other criteria you would use with regard to which is "best" but that one is good enough for me. Modern OEM filters are designed to flow enough air to support the rated power during the full life of the filter (that is, when dirty, and before the recommended replacement mileage).

Since air intake filters are more effective (filter down to smaller particle size) when dirty versus brand new, I often wonder how some people determine which is "best" in the first place. Pressure drop and AFM are reasonable tools to use, guessing or appearance is not.

Plus, and this is so commonly proven that it's surprising it needs mentioning, but having a filter flows more air and generates more HP/Torque than running open (remove the filter), regardless of whether the engine is stock or modified, including highly modified.

Aftermarket filters (K&N, etc) are useful if you are building a motor that is used off-road and therefore you have no OEM intake restrictions and will use an aftermarket air cleaner or intake tract, and can help a highly modified motor when carefully chosen (often that means ditching the OEM filter housing and intake tract). For a stock or mildly modified motor, it's just bling. Not that they are bad filters ... they're not ... but they are not likely to be an improvement over OEM; they can't "grab" more air if that flow potential doesn't exist.
'57 FL Straight 50 wt
'90 Miata 1.8L w/Rotrex Supercharger [Mobil1 0W-40]
'96 Ram 1500 [3.7L Mobil1 0W-20 / 1L 15W-50]
'01 PT Cruiser [Mobil1 0W-40]

#4542819 - 10/14/17 02:54 AM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
Olas Offline

Registered: 12/11/13
Posts: 3933
Loc: Manchester, England
It depends on who the OEM is. As a general rule, the OE filter is the best compromise between lifespan, filtration efficiency and CFM.

There are filters that excel in these areas, but it is unusual to find one who outperforms the OE in ALL areas simultaneously.
Cable ties should hold it

#4543000 - 10/14/17 09:27 AM Re: Is OEM Air Filter the "BEST"? [Re: Johnny2Bad]
PalmSpringsSCal Offline

Registered: 08/28/10
Posts: 68
Loc: SouthernCaliforniaDesert,USA
YOUR QUOTE "I often wonder how some people determine, I often wonder how some people determine which is "best" in the first place." and so on
Bingo...couldnt have said it better

In the post above yours "Pajaro" said what many say: "I just have personal belief,faith and trust." None of which are based on fact.

Its easy to do ,but careless.I catch mysel fwanting to rationalize the same way, from time to time. Its the easiest way out ..short term,but not longterm.

Edited by PalmSpringsSCal (10/14/17 09:36 AM)

#4543057 - 10/14/17 10:47 AM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
ragtoplvr Offline

Registered: 01/14/15
Posts: 529
Loc: missouri
years ago GM air filters used to be some of the best. Fram never seemed to get dirty. Drove a lot of gravel roads, AC filters got dirty the fastest, and at the dealer were cheaper than at NAPA. So it can happen.

Like anything, times have changed. No idea now.

#4543152 - 10/14/17 12:22 PM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
4WD Online   confused

Registered: 09/21/10
Posts: 6418
Loc: Texas
I use mostly OEM air filters and never OEM oil filters the stores are pushing STP or Framair filters
I have bought Wix at Napa and look well made

#4543535 - 10/14/17 08:03 PM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
Gebo Offline

Registered: 09/18/02
Posts: 2127
Loc: VA
I'm wondering how to find out more info about air filters. From my reasoning, the "only" way dirt can get into your oil is through the air filter.
'98 LEX LS400 280K
'00 LEX GS300 195K
'02 4Runner 225K
'05 Lex LS430 85K
'06 Toyota Highlander 145K
'09 Lex IS350 85K

#4543834 - 10/15/17 09:21 AM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
ATex7239 Offline

Registered: 01/19/17
Posts: 331
Loc: Texas,USA
I cannot remember when or where I heard this and I'm paraphrasing, but...

People want "the best" for their vehicle, but nothing on the vehicle is "the best."
'12 Buick Enclave 139,xxx
Valvoline ML SynBlend 5w30
ACDelco PF63E

'17 Ford Fusion (Company Lease) 42,xxx
Oil Don't know
Filter Don't care

#4545108 - 10/16/17 12:17 PM Re: Is OEM Air Filter the "BEST"? [Re: Gebo]
UG_Passat Offline

Registered: 05/27/08
Posts: 1970
Loc: NJ
I buy OEM, but not the OE filter. I put the OE filter for a different region of the world aka the Cold Weather filter.
2016 VW Tiguan|APR Stage 1|Neuspeed P-Flo|Osram CBI|Redline 5w30

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