but is it rated at a true 5 micron or is that a nominal rating ?hd wont tell ya and others claim it might on slim chance filter that .. course hd gonna say its the best they are selling them ..
..im just playing devils advocate here seems lots us K&N and ya never hear a prob ....
What does this mean? If "effective" means "we catch 15%," well, I'm not impressed. You need an efficiency number along with the size number before you can really think you know something. No filter is 100% effective - this would require either very regular holes, which are currently impossible to mass produce, or very small holes on average, which would block too much oil flow.
Motorcycle Oil Filters Air Filters
good but long read that probley will confuse ya more
and no it isnt for the reusable filters ..
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Heres a post from else where on ratings..a oil forum ...
Hi all,
This is cut and pasted from one of the many places I've researched, and let me tell you, after being booted from another biker forum, I've done extensive un-biased research on this!
Filter Ratings
Nominal filter Rating
Absolute Filtration Rating
Filtration Ratio (Beta)
1. A nominal rating is an arbitrary micrometer value indicated by the filter manufacturer and due to its lack of reproducibility this rating is of little or no value. Tests have shown that particles as large as 200 microns will pass through a nominally rated 10 micron filter.
2. An absolute rating gives the size of the largest particle that will pass through the filter or screen. This is the size of the largest opening in the filter.
3. A Filtration ratio is the ratio of the number of particles greater than a given size up stream from the filter to the number greater than the same size down stream from the filter.
Hope this is helpfull.
Do a search and learn about the differance between nano fiber and cellulose media. It should convince anyone of the benefits of nanofiber.