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Old 11-15-2012, 07:40 AM
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halltristan halltristan is offline
Bimmer Enthusiast
Location: Tennessee
Join Date: Feb 2012
Posts: 665
Mein Auto: 325i and X3
I only use Mann air filters. You won't see any performance boost with an oiled filter and it will kill your MAS over time. Even still I cleaned mine with some hope of seeing some MPG gain. Its recommended to clean it every time you change your air filter.

A word of advice: if you decide to clean your MAS: you don't have to take the air filter housing out. I know a lot of people do but you should have plenty of room. No need in working any harder than you must.

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