May try the aem washable dry filters I had k&n oil filters did not like messing with oiling them. Went back to other disposal filters for better filtration. Then i found the dry filters that others on forum are using. I went back to disposal filters when i read a article like this a couple of years ago! Got to thinking about it, have 50,000 miles now , in 5years maybe put another 50,000 miles? I change oil as required i think any small amount of anything that gets past filter will do no harm unless maybe after 500,000 miles are so , an i will be not of this earth anymore.

http://www.youtube.com/watch?v=IPYUef8iaSI