Review on WIX Filters 57202 Spin Filter by Jay Kenville

Wix is the only filter supplier I know of that publishes efficiency data shown as "Beta Factor" which is the industry standard for filtration. It is available for many but not all of their oil filters in their data sheet. The beta coefficient is the ratio of the number of particles of a certain size before the filter to the number of particles after the filter. Don't expect any particles downstream as this will cause problems getting the oil through the filter. I'm not sure why others don't post their test data as it allows users to make informed decisions.