I had a lengthy discussion w/ my mechanic about the good vs. bad in using a K&N air filter. He stated that even new filters out of the box are sometimes oversaturated in oil and this can lead to problems w/ the Mass Air Flow Sensor and a dirty throttle body. Also, he stated that the K&N oil doesn't always catch the small particles as good as a paper filter due to the increased air flow and it's those particles that can also do damage. He's torn apart enough of them to see the damage first hand... that being said, I'm considering removing my K&N when it starts to look dirty and go back to using a paper air filter... maybe one of the new FRAM AIR HOGS?