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This is not new information. It has been suggested in many forums that K&N filter use can lead to increased engine wear. I have not seen hard evidence of this. I myself just had an oil test on my 1995 Subaru Impreza with 185000 miles on it and 4350 on the oil. It showed a silicon level of 10 (normal is 9) and the report from blackstone lab suggested, "Silicon was okay at 10 ppm, though you might be able to bring this number down by changing the air filter."
BTW, engine wear parameters were fine otherwise!
It is also well know that the MAF sensor can be harmed if too much oil is applied on the filter and gets "blown" off into the intake. This is associated with cleaning and reoiling, not from use out of the factory packaging.
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