K&N air filter for 2020 Duramax Diesel- Yes or No

[Jason-Texas]

Walmart is your friend. Look it up and install it yourself. Not difficult.
Rich

Yep, headed there this morning.

[Wileykid]

Other than the tests that show the stock filters provide better filtering, the truck can only use so much air. The stock filter is designed to allow all the air the truck can use, so what benefit does additional air provide when the engine will not use it.

[Hoopy Frood]

Other than the tests that show the stock filters provide better filtering, the truck can only use so much air. The stock filter is designed to allow all the air the truck can use, so what benefit does additional air provide when the engine will not use it.

I believe the theory behind K&N usage is the K&N filters better when dirty but still flows more air than a stock filter, which restricts air flow as it gets dirty. Like I said, that's the theory.

[Conner58]

Stock air filter alway the little you may gain you will never tell the difference ��

[RLK436]

I tried the K&N filter on my 2007 Duramax when it was new and kept getting mass air flow sensor errors. K&N swears that their filter is not the cause, but I went back to disposable filters and have not had any more issues.

[JessJoe4168]

This is my first diesel truck so no experience. I have had it for about 6 months, bought used.

I went online to purchase a K&N air filter for my 2020 Duramax and saw a lot of reviews that stated the K&N will cause the engine to throw a air filter error code and that you must first disable the air filter life setting and this will prevent the error code. Secondly, I saw a bunch of others claiming the K&N is not as good as quality paper filters as it lets in too much particulate.

I have always used K&N on my gas truck with no problems.

What are other diesel owners doing? Thanks for any insight.

Suggestion - Use OEM air filters and do not clean an air filter. It will not get perfectly clean, and you might damage the pleats. Air filters need to be 99.9% efficient because a slight bit of dust causes damage - you may not see it immediately as the effect is cumulative.

[gfl123]

the term is "turbo dusting" , when enough dirt passes thru that ruins the turbo on your diesel. I too thought k/n was the top dog until i used one on my brand new atv few years back.. even used the added dust cover,, but maintenance time showed that dust was passing thru the filter leaving residue in the intake tube. not worth it.