Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - K&N round drop-in filter for 2013 Focus?
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Old 04-16-2013, 03:18 PM   #7
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Originally Posted by sgmfocus View Post
they come preoiled have to be cleaned reoiled eventually, not much difference in sound but i'm light footed on accelerator did see an improvement in mpg went from 35 b4 to 38+ after , big differences on prices i got mine for about 47.00 free shipping at seen them 70 or 80 dollars for same thing other places
I would not expect any mpg gain as 99% of the time the throttle will be providing resistance to limit airflow into engine anyway so reducing the resistance with a K&N only means the throttle needs to be closed more so the net resistance will be the same. Lower resistance does, however, permit higher max power and higher power at all rpm's at max throttle...

2012 FF Ti HB Sonic Blue, Built 5/7/12, 401A + Parking Technology Package and MFT w/NAV 3.0.2 -> 3.2.2 -> 3.5.1 -> 3.6.2
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