MS filter is oiled. you can clean it by buying a recharge kit. just get the K&N kit which also comes with red oil. you can get this at your local autozone or canadian tire(for those in canada)
recharge kit will come with a cleaning solution which u use to wash the filter. once this is done, let the filter dry overnight before you start oiling. the filter should be pale pink after it is washed. and once you re-oil it, it will have the original deep red look again.
Current: 2013 F10 M5 & 2013 GLK350
997.1 GT3RS (gone)
2009 WRX STI (gone)
e92 M3 (gone)