Reviewed By Steve W (Lansdale, PA) Reviewed for a 2003 Toyota Matrix —12/20/2008 9:39 AM
I put the K&N filter in my 2003 Toyota Matrix and it dropped a few RPM at idle so I knew it was flowing more air. I seem to be getting better gas mileage around town but I haven't gone for any considerable distance to make an exact calculation. I am sure highway savings would be increased more than city mpg. Figuring these cost about twice what a regular filter would cost it is well worth it for a lifetime filter. If you take a total look at the oil and filter cleaner you have to buy it will take you a few years to come out ahead but after that it is all money in the bank (you will recoup your investment faster if you equip multiple vehicles since the oil and filter cleaner can be used for them as well).