K&N FILTER INQUIERY

The range of performance across the spectrum of ALL full flow oil filters is so small as to be almost insignificant in practical application. Some are made better, have different types of ADBV valves and offer varying ranges of nominal filtration values in the 10-30Um range. For normal (yeah, define "normal") street driving at common oil change intervals (3k-7k miles), it makes absolutely no difference what oil filter you use.

Some factors to consider in selecting a filter for other applications might include higher pressures in racing engines and better flow characteristics for same. Then things like the K&N and other race-ready type products might make sense. Otherwise, fuggedaboudit. You're not gonna bust even a FRAM at 80psi when they're rated at 200psi burst pressure.

If you're worried about filtration, look for lower nominal micron ratings. But remember better filtering ususally also means less flow rate. Even the best rated full flow filters will not filter out down far enough to get all the abrasives out (5-6Um). If you are really worried about filtration and want to actually clean the oil in your engine enough to nearly eliminate harmful oil particulate contamination, go with a real bypass filter. You can see mine in the lower right-hand corner of the avatar.