Yep, I agree completely with my neighbor above.
A friend of mine who formerly worked as a mechanic at the local Dodge dealership has told me frequently of owners of late model Rams with Cummins engines still under warranty who brought their truck to the service department with a complaint of high oil consumption, blue smoke, etc.
My friend told me the first thing they did was pull the top off the air cleaner box. If they found an aftermarket filter, K&Ns were his "favorite", they simply voided the warranty and called the owner to come get his truck. A replacement or reman Cummins engine comes with a high price tag.
We live in cotton farming country where the winds blow most of the time, sometimes very hard in spring and fall. Dirt will quickly ruin an engine. The OEM filter prevents dirt intrusion. Why mess with a good thing? The OEM filter was carefully engineered to protect your engine?
Aftermarket filters improve nothing but the seller's bottom line.