K&N Air filter questions - Toyota Yaris Forums

127.0.0.1 · 11-17-2009, 04:28 PM

just use an OEM

if you could improve MPG by dropping in a different filter, Toyota would have done it already.

the engine and ECU is designed and fretted over as a complete system. changing one thing won't do jack. for any real improvements you need much money and time installing.

the only single mods which improve MPG are:

taking weight out, or rotational weight (lighter pulley, wheels) (get rid of seats)
less friction (lighter oils, skinny tires, overinflated tires)
aero body work (add-ons, take-offs, remove wipers...)

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11-17-2009, 04:28 PM	#2
127.0.0.1 Banned Drives: '10 Yaris5drHB+99 4runner LTD Join Date: Sep 2009 Location: NE Posts: 672	just use an OEM if you could improve MPG by dropping in a different filter, Toyota would have done it already. the engine and ECU is designed and fretted over as a complete system. changing one thing won't do jack. for any real improvements you need much money and time installing. the only single mods which improve MPG are: taking weight out, or rotational weight (lighter pulley, wheels) (get rid of seats) less friction (lighter oils, skinny tires, overinflated tires) aero body work (add-ons, take-offs, remove wipers...)