The oil is there to capture dirt particles. Without it, the filters will let in far too much contaminants. Not good and not recommended. K&N's require re-oiling about every 50k-100k miles depending on type and use. There are dry type filters available from other companies, but I wouldn't run the K&N's dry.
__________________
[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]
|