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CAF Differences #5319371 01/11/20 07:26 AM
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RamFan Offline OP
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Yes, CAFs do reduce debris from entering the cabin and collecting in the blower motor. For those who spend lots of time behind the wheel and suffer from various allergies, a HEPA or high efficiency variant can reduce flare ups.

But for the vast majority of people/vehicles, aren’t we really talking about a glorified rock catcher? I’ve always subscribed to finding the cheapest CAF and running it for the recommended service interval, I’ve never noticed a difference.

Have you noticed a difference between brands and/or styles?


18 Giulia Ti Sport Q4
  • 2.0T I4 - 22k - PP Euro LX 0w30 - PureOne - 10k/1yr

16.5 CX-5 Touring AWD
  • 2.5L I4 - 67k - Castrol Edge EP 0w20 - Denso - 7.5k/1yr
Re: CAF Differences [Re: RamFan] #5319388 01/11/20 07:49 AM
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SVTCobra Offline
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Just recently bought 5 CAFs of different brands, prices, and types. Obviously will take a while to see anything but first impressions are they all look of similar construction.

Did buy one that advertised active charcoal for improving the smell of the cabin and was actually cheaper than the normal Wix filters I usually buy.


Think twice, speak once.
Re: CAF Differences [Re: RamFan] #5319391 01/11/20 07:56 AM
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Sayjac Offline
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On this one we agree. I use the least expensive CAFs and have them found pretty close if not identical to OEM. Some like the charcoal infused CAFs. Seems like a solution in search of problem 'to me'. And 'I've read' that some of them restrict air flow. Here's last CAFs I purchased, they've gone up a tad, I got a pair for ~$12. Couldn't tell difference between them and OEM, except air flow arrow missing from filter. Not hard to figure out.

https://www.amazon.com/gp/product/B01N1V34RI/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

Re: CAF Differences [Re: RamFan] #5319397 01/11/20 08:07 AM
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Bud Online Content
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How in the world did we all survive before the CAF came along.


2016 Honda Pilot EX-L with NAVI.....Mobil 1 0w20 AFE and Honda OEM Filter
Re: CAF Differences [Re: Bud] #5319400 01/11/20 08:11 AM
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RamFan Offline OP
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Originally Posted by Bud
How in the world did we all survive before the CAF came along.


How did we survive before seatbelts? Air bags? Vaccines? Food safety standards? Etc., etc.

It’s called progress.


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16.5 CX-5 Touring AWD
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Re: CAF Differences [Re: RamFan] #5319407 01/11/20 08:26 AM
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Snagglefoot Online Content
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It’s useful for salesmen.” You say your wife gets hay fever? This model has a cabin air filter.”


If you want the job done right......do it yourself.
Re: CAF Differences [Re: RamFan] #5319439 01/11/20 09:02 AM
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atikovi Online Content
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Originally Posted by RamFan
Originally Posted by Bud
How in the world did we all survive before the CAF came along.


How did we survive before seatbelts? Air bags? Vaccines? Food safety standards? Etc., etc.

It’s called progress.


As maintenance needs of modern cars were reduced through the 80's and 90's, the car makers needed an additional revenue stream for their parts and service departments. This was a pretty easy way to do that. Charge $20 for a filter that costs them less than a buck, then charge 1/2 to one hour labor to replace it.

Re: CAF Differences [Re: RamFan] #5319524 01/11/20 10:14 AM
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Leo99 Offline
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I run a air filter in my furnace at home. Why not one in the car, too?

Don't believe in CAF in cars, don't use one. Silly to say they don't have a benefit.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 392,000 miles
2015 Camry 90,000 miles
Re: CAF Differences [Re: RamFan] #5319613 01/11/20 11:40 AM
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I tried a Bosch 6038C HEPA filter in our Forester and it reduced the flow on high fan speed to almost nothing. The HVAC restriction prevented the cabin from easily maintaining temperature (once it FINALLY got there) on a long drive of ~ 2hrs. On auto, the fan speed reached one tick from max and pretty much stayed there the entire trip.

I installed K&N washable/reusable filters in both of our vehicles, as they became available, and I'm completely satisfied, so far. I'll be pulling the Legacy's filter for the first time in over two years sometime soon to "refresh" it. I'll do the same for the Forester, even though it's been installed for less than a year.


14 Forester XT Touring FA20DIT (Cobb Stage 1)
Castrol Magnatec 5W-30 D1G2 + FU filter (72,320mi, 8/24/19)
15 Legacy Premium FB25
Magnatec 5W-20 + FU filter (47,300mi, 5/11/19)
Re: CAF Differences [Re: RamFan] #5319890 01/11/20 03:31 PM
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Kira Offline
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To Bud: ONE MORE TIME: The CAF is there to protect the (swear word) air conditioning evaporator.

Since the SACBP (Stupid American Car Buying Public) can't fathom that, they're told it's to clean the cabin air.

OK? Don't make me tell you again or I'll root against the Texans in the upcoming game.

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