I had an interesting experience at Advanced Auto Parts.
I wanted a new air filter. The one I wanted was a Purolator version for $12. But there was a K&N version for $50. I couldn’t understand why that one was so expensive. It couldn’t possibly be that good, or could it?
The salesman at the store demonstrated it for me with a nifty air blower/ping pong ball display set up. It was impressive. The K&N filter
Now consider this, I change my air filter a lot less than I should. I do it about every 15K miles. My car is already 8 years old with >135K miles. To make this filter cost effective for me, I’d have to keep it for another 60K miles, i.e. another 3 years, nearing 200K miles on the car.
I’m just not sure I am going to keep the car much longer. 200K miles is about the point I’d need a new clutch and that’s when I said I’d get rid of it.
In the end, I got the Purolator one for $12 and change.
FWIW, my boyfriend uses the K&N air filter for his Jeep. It does get a lot of air flow and he cleans it off and puts it back into the car. There is a special cleaning kit for it that costs another $~10.00 for multiple washings but he doesn’t always use the kit. He says the cleaner is ammonia-based so he just uses plain ammonia. There is a special oil in the kit to be sprayed on before installing back in the car.
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Does the higher air flow reduce fuel consumption?
moom: theoretically higher air flow can reduce fuel consumption. Cars now have electronic fuel injection which controls the air-fuel mixture.
My filter (K&N) was only a couple of dollars more than the OEM filter; under $30.