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I was told that the oil used on these filters can mess up the Mass Airflow Sensor? Any comments on this?
I had the K&N in my 97 M3 but I don't think it did much! I re-oiled it according K&N specs, but I don't think there was much overall money saved vs buying a new air filter every year or so.....
I doubt there is any measurable change in performance.
Mike
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2018 M5 and 2019 Porsche Boxster GTS
Prior. '94 325is, '97 M3 Lux, '16 M2 |