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Thread: Fuel Mileage?
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Old 11-12-2012, 12:43 AM   #27
Focus Enthusiast
Join Date: Nov 2012
Fan#: 105907
Location: La Honda, CA
What I Drive: 2013 performance blue ST3

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FF Reputation: 2 aernan Good Standing Member
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I have K&N on my Range Rover and what I'm hearing from the car guys is it lets too much dust/dirt into the engine. Great for racing but bad for longevity. They are recommending a full synthetic fiber replacement like the ones Amsoil makes. So that's what I'm going to hunt down.
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