I checked there are 2 classes of filters. The first class is the minimum class and ALL filters meet that requirement. There is a newer "class" of filter test that is not required by any OEM specs or filter specs.

Here is the sae tests,,

SAE Tests

All filters have to undergo SAE (Society of Automotive Engineers) tests to verify that they meet the vehicle manufacturer's specifications.  There are two tests available for automobile engine oil filters.  All filters must be tested with the J806 test, but the new J1858 is much more meaningful.  Currently the J1858 test is optional.  Usually, the high-end filter manufacturers will display these numbers to show off their great filters.

The SAE J806 test uses a single-pass test, checking for contaminant holding capacity, size of contaminant particles trapped, and ability to maintain clean oil.  As an amendment of the J806 test, the multi-pass test also looks for filter life in hours, contaminant capacity in grams, and efficiency based on weight.  The efficiency of the filter is determined only by weight through gravimetric measurement of the filtered test liquid.  Typical numbers for paper filter elements are 85% (single pass) and 80% (multi-pass).

The SAE J1858 test provides both particle counting and gravimetric measurement to measure filter capacity and efficiency.  Actual counts of contaminant particles by size are obtained every 10 minutes, both upstream (before the filter) and downstream (after the filter), for evaluation.  From this data filtration ratio and efficiency for each contaminant particle size can be determined as well as dust capacity and pressure loss as a function of time.  Typical numbers for paper element filters are 40% at 10 microns, 60% at 20 microns, 93% at 30 microns, and 97% at 40 microns.

NOTICE: Since all of the SAE data I have is from the manufacturers, it cannot be trusted to be unbiased.  Therefore all SAE data has been removed.