....
> Thinking twice about putting a K&N on my new vehicle. Maybe it belongs on
> eBay instead?...

The K&N was the best at what it claimed to be the best at. Free air flow.
One thing the study didn't talk about what how much tolernace for dirt did
the motor have? Were all air filters within the manufactures specs?

Less junk getting into your motor is a good thnig, but at some point it
won't matter due to your oil filter etc.