AK Ram:
Valid points. I've had K/N for 180K mi of 191K mi on Toyota 4wd I had, 102 K mi on 96 Ram I had, 62K miles on my 02 Ram 3500 and 45K on wife's 03.
I live in real dusty invironment, but have not had problem thoroughly cleaning it. I've never had over/underoiling problem as indicated by resisdue free and dust free turbo. I use tube to oil mine and use steady pressure and motion oiling. The dye in the oil helps verify even coating. I do believe my oil type filter give me extra protection and lifetime service.
Again, I don't blame anyone who doesn't want the bother with air filter maintenance. I know folks who are just as happy w/ the stock setup and ones who swear by the BHAF. Everyone has their favorite.
Happy Trucking, Wiredawg