Other How well does YOUR air filter work? [Archive] - Toyota MR2 Message Board

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This subject came up for me on my local SCCA forum this spring. A member posted about needing an engine rebuild due to worn rings, and the (very experienced) mechanic that he took the car to suspecting that his K&N filter may have been at least partially to blame. Another member chimed in mentioning that his car came with a K&N, and his first used oil analysis showed elevated levels of silicone, ie, the primary ingredient in sand! Switching to a paper filter eliminated the silicone from his