This is a discussion I've seen every couple years over the last 10 years I've been on TDR and everytime I see it I get upset at all the so called experts that are on here. I'll get slammed for saying this, but I've used one for the last 200,000 miles. I change oil every 5,000 miles and rarely have to add oil between changes. It used to be everyone was concerned about oil coating everything including the compressor vanes in the turbo. Not happening.
My suggestion is for everyone that hasn't used one just remember you are expressing an unfounded guestimate or just repeating a rumor. If you have used one and had a bad experiance, tell us your experiance, those of us that have had years and hundred of thousands of miles experiance should also be able to express our results.
I am not an expert by any means, but I do know two things;
1. The OEM filter works great for me, so why would I want to use anything else that's questionable.
2. The use of K&N filters have void some Dodge/Cummins owner warranty.
george