Well I've joined the No Longer Stock set by installing my new K&N filters today. They were my second purchase, but my first mod. Hopefully I'm a long way from re-oiling, so no foreseeable risk to my MAF at this point. I was pretty amazed at how dirty the stock filters were after 3,946 miles. I even found a dried up leaf on top of the left filter...I guess that's a good reason for having a filter...to prevent sucking leaves into the intake.