Although AMSOIL SDF filters provide exceptional protection and performance in diesel applications, extensive research has determined that Donaldson® Endurance™ filters provide an extra edge of protection and performance. New, sophisticated diesel engines designed to meet today's stringent emission standards benefit from superior filtration, and the AMSOIL philosophy of delivering top-of-the-line products necessitated the partnership with Donaldson® to carry Endurance™ filters.

The Donaldson® Endurance™ filter is constructed with full synthetic media that is exclusive to Donaldson®. Donaldson® synthetic media have a controlled size, shape and smaller fiber diameter that effectively capture contaminants on the surface. The exclusive Donaldson® synthetic media design results in a full flow filter that delivers extraordinary performance with greater efficiency, capacity and flow. Donaldson® Endurance™ filters are 98.7 percent efficient when faced with 15 micron contaminants, and they are 50 percent efficient when faced with seven micron contaminants. The smallest particle that can be seen with the naked eye is around 40 microns.

Donaldson® Endurance™ filters are more efficient than conventional filters. Because dirt is the number one cause of wear, it is critical to stop as much as possible to prevent wear and extend engine life.

Donaldson® Endurance™ filters offer greater flow. Greater flow reduces restriction, allowing oil to be easily pumped to vital components, while also aiding cold weather starting.

The following charts demonstrate the superior performance benefits of Donaldson® Endurance™ oil filters in the areas of efficiency, capacity and flow restriction: