The Amsoil oil filter used for the Dodge/Cummins application is actually made by "DONALDSON". The number is ELF7349. They are made with advanced synthetic and nanofiber technology that results in fibers that have a controlled size, down to "submicron" diameters. They provide a filtering efficiency in accordance with industry standard ISO 4548-12 of 98. 7 percent at 15 microns, 50 percent at 7 minrons, and claim to be the best in the industry.
I have read where the efficiency percentage as well as the capacity was tested using the CUMMINS spec#10634 and was much higher than the cummins spec.
Example: EFFICIENCY spec for CUMMINS 59. 5 percent. Donaldson "endurance" filter was 98 percent.
Example: CAPACITY spec for CUMMINS 54g. Donaldson "endurance" filter was 125g.
Here is a picture of the ratings printed on the filter.
Wayne
amsoilman