Yes you'll never have to buy another air filter. but who wants to clean that thing and oil it?
Care to read this from BITOG?
http://www.bobistheoilguy.com/airfilter/airtest1.htm
I can save you some time - paper filters filter the best. That's what should be driving our decisions - Keeping the grit out of our engine oil.
__________________
2016 340i XDrive, EBII/black, 6 MT, M Sport, Track Handling, Cold Weather, Tech, Lighting, Driver Assistance Plus.
2012 Z4 35i, ED 2/24/2012, Melbourne Red Metallic, Black Leather, Carbon Trim, 6MT, M Sport, CW, PP, PS, NAV, CA.