More BITOG heterodoxy:
Well got curious about the dirty/oily airbox claims from some here so I checked it myself. 2014 Mitsubishi Outlander 75K miles. Have used the K&N since about 10K miles. Recently ~10K miles cleaned and carefully reoiled the filter. A white paper towel demonstrated some (not much) very fine soot, not gritty. Absolutely no trace of any oil. Admittedly I drive in a fairly clean environment but I think the results of this crude measurements don't warrant tossing the K&N. May trade the vehicle in at 100K when the warranty expires so I probably broke even or a bit ahead by buying the oiled filter vice four or five standard paper filters.
View attachment 101178