Stock air filters are inexpensive and work well. K&N oiled filters have worked well for many but have caused MAF contamination issues for more than a few. I had one and replaced it with a stock filter.
In NA cars there is no performance gain that I have seen documented. In turbo cars, with a tune there are generally no performance gains to be had on the intake.
I heard from reviews that K&N filters cause damage to MAF sensors because people over-oil them. Hmmm... maybe stay away from it to be safe.
I just got overwhelmed by the fact it doesn't need to be replaced.
Quick question: does anybody do anything 'secret' to their air filters to make it last longer? Like keeping the material from wearing out as fast, (i.e. cleaning it every week, or putting a few drops of ?).
Air filters are cheap I replace mine in my drivers once a year as for making them last a little longer just blow them out with some air when you change your oil . As a few members have stated K&N flow a bit better but the oil is the killer and most people don't service them like they recommend