
Bought 4.5 years ago, still works great. I've put 70,000 miles on my civilian with this installed and I've cleaned and re-greased it for 50,000 miles as the packaging suggests. I don't know if I noticed an increase in mpg when I first installed the K&N, but I've never seen my mileage decrease due to contamination. Over time it has paid off. If you're planning on leaving your car for a while, put a K&N filter in it.

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