I went with a K&N and wash it every oil change.
Pros: wash it every change
Reviews of K&N air filter
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907 votes
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I have the K&N one. There wasn't much noticeable difference for mine, although mines a Non-S. It did save me more money long term as I only have to clean it and prime it vs replace it.
Pros: saves money long term
Cons: little performance difference
Vehicle:
MINI
After I swapped to a K&N drop-in filter and a lighter cat-back exhaust (the one I had was lighter than the stock), I was getting around 22-24 MPG with my EcoBoost.
Pros: better MPG, lighter than stock
Vehicle:
Ford Mustang
I change mine every year. Along with spark plugs and clean my filter’s (have k&N ones you don’t throw those ones)
Pros: cleanable filter
Vehicle:
Volkswagen
Ive been using the k&n reusable filters, they have held up pretty well. Expensive.
Pros: held up well
Cons: expensive
I just put in the K&N drop in air filter and I notice surprisingly large throttle response. It almost makes the ascent feel like a lighter vehicle.
Pros: better throttle response
Second, these things suck! Buy a Non-Oiled cold air intake instead. If this is a Planted ad, K&N even has one, I have it on my TRDOR. Third, I am a dealer parts guy as my career... And, yes, I Know better. And yet I STILL over oiled my K&N filter and killed an expensive Mass Air Flow sensor on my truck. So I will Never use an oiled filter again. Old technology, imho.
Cons: killed MAF sensor
Vehicle:
Toyota
Fitted k&n drop in last night, mk7GTI, 100% feel a difference, very subtle but it’s there. I suppose time will tell if there’s a downside. Ever so slight difference in response, coasts slightly further in gear without foot on gas. Drove it a lot today and felt the fuel economy might be a tiny bit better too, but I’ve no solid proof whatsoever, but I drive it a lot so I know it very well. All of which would make sense from a less restrictive filter.
Pros: subtle difference, better fuel economy
Vehicle:
Volkswagen Golf
I CLEANED and oiled the K&N filter my truck had when I bought it. It went from 14 mpg regularly, to almost 18 regularly.
Pros: improved MPG
I used a K&N oil free washable filter for years without any issues. I only recently took it out when I moved to a CAI. I washed it about every 10K miles. Takes about ten minutes and I would just do it in the evening so it had all night to dry.
Pros: easy to wash, long lasting
Mileage: 10000 km
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