Originally Posted by
CrzHelm
in past 2 vehicles i damaged 2 of those mass air sensors from using k&n oil type filters. between the cost of the k&n, new air sensors, and oil cleaning kit, I would never recoupe the money spent in trying to save 1or2 mpg. just by the cheapest air filter every year and you'll be better off.
Based on advice from other FTEr's, I ditched the K&N that came with my X for the stock air filter.