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Old 07-11-2014, 07:56 AM   #9 (permalink)
digital rules
What brake pedal?
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Join Date: Feb 2014
Location: Chantilly, Virginia
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Silver Streak-5M - '05 Toyota Corolla S
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Keep the stock filter for best MPG. K&N filters may benefit high performance enthusiasts, but not any real benefit if max MPG is the goal.

Surprisingly a dirty filter has no affect on fuel economy with EFI engines, as the computer will adjust A/F mixture accordingly. It does make a difference on carbureted engines though.

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