Way back in my youth, I remember the family having a lawn mower with
an air filter that was partly filled with oil. Today they all use
paper, including the one I've had as long as I've been married. Still
runs fine. Weren't there also some old cars that used oil filled air
filters? Nobody does that today. Paper filters rule.
It just seems intuitively that a lower restriction filters must have
more open area to pass air. Sure, oil covered screens will pick up
some of the micro dust, but I'll bet more gets through a K+N that
through paper. Is a couple more horsepower worth the risk to the
engine? If you're a racer, or like to do rebuilds, maybe. But for
the street? Maybe not.
Stu
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