I personally don't use K&N filters of any kind, but I know some people like them. I was curious as to how good or bad their filtration is, so decided to try and find the data on the filtration capability of K&N oil filters. I "chatted" with K&N online and the conversation went like this:
[4/15/2019, 7:07:11 AM] Demi: Hello Ed, welcome to Live Chat. How may I assist you today?
[4/15/2019, 7:07:38 AM] Ed: Can you give me the filtration specifications of this filter: https://www.knfilters.com/oil-filters/cars-and-trucks/ps-7027-oil-filter
[4/15/2019, 7:08:19 AM] Demi: Each K&N oil filter is tested to verify that they meet or surpass the requirements of the vehicle manufacturer. However, at this time the micron rating test information about our oil filters is not available.
[4/15/2019, 7:09:44 AM] Ed: Seriously??? K&N doesn't have micron filtration stats???
[4/15/2019, 7:09:54 AM] Demi: Each K&N oil filter is tested to verify that they meet or surpass the requirements of the vehicle manufacturer.
[4/15/2019, 7:10:26 AM] Ed: That's really easy to say when you won't supply PROOF to consumers.
[4/15/2019, 7:10:41 AM] Demi: Is there anything else I can assist you with today?
[4/15/2019, 7:11:01 AM] Ed: Nope. You've told me everything I need to know about K&N filters.
I can only believe that K&N filters are pretty lame which is why they don't disclose this information to consumers.
Ed
[4/15/2019, 7:07:11 AM] Demi: Hello Ed, welcome to Live Chat. How may I assist you today?
[4/15/2019, 7:07:38 AM] Ed: Can you give me the filtration specifications of this filter: https://www.knfilters.com/oil-filters/cars-and-trucks/ps-7027-oil-filter
[4/15/2019, 7:08:19 AM] Demi: Each K&N oil filter is tested to verify that they meet or surpass the requirements of the vehicle manufacturer. However, at this time the micron rating test information about our oil filters is not available.
[4/15/2019, 7:09:44 AM] Ed: Seriously??? K&N doesn't have micron filtration stats???
[4/15/2019, 7:09:54 AM] Demi: Each K&N oil filter is tested to verify that they meet or surpass the requirements of the vehicle manufacturer.
[4/15/2019, 7:10:26 AM] Ed: That's really easy to say when you won't supply PROOF to consumers.
[4/15/2019, 7:10:41 AM] Demi: Is there anything else I can assist you with today?
[4/15/2019, 7:11:01 AM] Ed: Nope. You've told me everything I need to know about K&N filters.
I can only believe that K&N filters are pretty lame which is why they don't disclose this information to consumers.
Ed