K&N filters

I run a K&N on my Lincoln LS more because I got tired of stripping two layers of skin off my fingers every time I checked my O.E.M filter.I have around 120,00 miles with no Problem. I know a lot of aftermarket car builders like Rouch, Shelby, and others use similar products as well as Ford performance and it doesn't void their OEM warranty so I feel comfortable using it. I don't use them on any other vehicle I own. My class C is a 1978 on a 1977 C-30 chassis with only 19,980 miles on it and runs like it. I don't plan on any mods like the K&N but one thing I do like about them is all you have to do is look at it so, maybe in the long run by being easy to check and maintain they get better maintenance.