You will get all sorts of "internet experts" telling you that K&N filters aren't as good as a paper filter. I have used them in all my cars for the last 12 years. My oil is NEVER gritty, no MAF issues (on my Corvette & Z28) and in my 5.7 Hemi, I actually got an increase of 2-3 MPG.
K&N has videos showing how to properly oil them. People that see problems while using K&N filters erroneously attribute their problems to an air filter.
Just change your oil and take care of your vehicle and K&N filters will do just as they're supposed to: increase air and offer all the filtering that you'll ever need.