Go with a factory type air filter unless the vehicle is for racing.

https://m.youtube.com/watch?v=NJKlb61_kXU

This site has some good auto repair advice in it. I trained him myself I haven't found anything I disagree, or seriously disagree, with. Here is what he has to say about cold air intakes. http://ricksfreeautorepairadvi...ld-air-intakes-work/ The picture at the top of the article shows one that isn't.

I have used washable filters for years with no ill effects. Have had an Italian made Sprint Super Competition micron mesh dry polyester air filter in my 2003 Honda S2000 for the past 15+ years. Gets a good periodic soap and water bath.

If you're bored and would like more technical discussion on the source of silica in oil (which doesn't come from dust drawn in through the engine induction intake), you can visit this article:

http://www.wearcheck.co.za/sha...s%20of%20silicon.pdf