K&N Filter? Worth It?

mrpenguin

New member
Just curious what you guys have seen for performance and economy when dropping in a K&N filter (not the cold air intake system). Thanks!
 
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I've installed k&n filters on all the vehicles I've owned. The HP gain is not something you can notice, but I purchased the k&n filter mainly for basic maintenance and upkeep. One and done. :cheers:
 
If you are looking for tangible increases in mpg, power, etc etc, they are not worth it. As far as the argument that they last "forever" by just greasing it, that's a ton of huey too. Don't mean to offend anyone here who uses them, but at least that's my opinion and experience. I have experience in them and vowed many years ago never to get them. Re-oiling them is messy and a pain in the ass.

However the "growl" of your rig will be more noticeable, so if that is enough to sway you, go for it.
 
I found the same as [MENTION=50507]CookieRoe[/MENTION], sounds louder, didn't really notice anything other than that. Cleaning it and re-oiling it did become bothersome, ran into a few times where something came up and needed to run out but filter was still drying, eventually I bought another one to have one ready. After awhile I gave up and went to off the shelf. Just my 2 cents, if you like it then go for it.
 
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If you're not planning to put the enclosed K&N sticker on your back glass next to your YETI sticker, then I'd say no. Probably not.
 
No, not worth it.

Filters are for protection. It's not worth wasting a MAF sensor for gain of what... maybe 2 hp? Go with a NAPA Gold or an Amsoil filter; at least the air coming in will be clean.

If you're looking for power and sound, you're crazy to think that a filter will net any appreciable gains.
 
I've installed k&n filters on all the vehicles I've owned. The HP gain is not something you can notice, but I purchased the k&n filter mainly for basic maintenance and upkeep. One and done. :cheers:

My K&N has over 100k miles on it. Looks a bit worn, but it still gets the job done.

I found the same as [MENTION=50507]CookieRoe[/MENTION], sounds louder, didn't really notice anything other than that. Cleaning it and re-oiling it did become bother some, ran into a few times where something came up and needed to run out but filter was still drying, eventually I bought another one to have one ready. After awhile I gave up and went to off the shelf. Just my 2 cents, if you like it then go for it.

I used to keep a stock filter laying around, then it got thrown away at some point but wasn't a big deal because I always had the motorcycle. Now I just drive the Tacoma if I need to go somewhere.

Anyone destroying a MAF is over oiling and it really doesn't happen as often as everyone thinks it does. I also had a K&N in my bike, and the one in the 4runner is the one that I've had in my 4.0 Tacoma since it had 100 miles on it (100k now) I just swapped it out since I don't drive the Tacoma as much. No problems on the Tacoma MAF.
 
My K&N has over 100k miles on it. Looks a bit worn, but it still gets the job done.



I used to keep a stock filter laying around, then it got thrown away at some point but wasn't a big deal because I always had the motorcycle. Now I just drive the Tacoma if I need to go somewhere.

Anyone destroying a MAF is over oiling and it really doesn't happen as often as everyone thinks it does. I also had a K&N in my bike, and the one in the 4runner is the one that I've had in my 4.0 Tacoma since it had 100 miles on it (100k now) I just swapped it out since I don't drive the Tacoma as much. No problems on the Tacoma MAF.

Over, Under, or Properly oiling it still results in MAF becoming dirty/failing. Doing used vehicle inspections for the dealer, more than 3/4 of the vehicles that had issues that were traced back to the MAF also had K&N filters in varying degrees of "oiling."

They have very poor filtration capability, which they offset with an oil film; which both works and doesn't work when it gets sucked into the intake and coats in inside of the intake with tacky oil. I'd rather use a dry filter if you're going to go the route of less filtration for more "power." It's just not worth it to me to run an oiled filter in a MAF vehicle for all the problems I have seen them cause in the long run, if it's a MAP vehicle; it doesn't matter I suppose (I mean the intake is still getting coated, but whatever...)
 
Over, Under, or Properly oiling it still results in MAF becoming dirty/failing. Doing used vehicle inspections for the dealer, more than 3/4 of the vehicles that had issues that were traced back to the MAF also had K&N filters in varying degrees of "oiling."

They have very poor filtration capability, which they offset with an oil film; which both works and doesn't work when it gets sucked into the intake and coats in inside of the intake with tacky oil. I'd rather use a dry filter if you're going to go the route of less filtration for more "power." It's just not worth it to me to run an oiled filter in a MAF vehicle for all the problems I have seen them cause in the long run, if it's a MAP vehicle; it doesn't matter I suppose (I mean the intake is still getting coated, but whatever...)

To each their own. I know you're a tech and see your share, but in my personal experience, I've never had an issue over 4 cars and 1 motorcycle for what I'm guessing is close to 250k+ miles altogether. Not a drop of oil in my bike's throttle bodies over 30k miles of running it before it got wrecked. Tacoma and 4runner both have secondary filters still for peace of mind should I accidentally over oil, but after using them for well over 15 years, I've gotten that down to an art. I'm merely throwing out my real world experience on them as a regular user, other people have their horror stories. It is what it is.
 
I've got a 99' Limited with 266k miles and the same K&N filter which is washed/oiled at regular intervals and I've never had any MAF problems. I added the filter at the first recommended oil/air filter change after buying the vehicle new.

Just my 2 cents
 

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