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Heavy-Duty By-Pass System
EaBP Oil Filters with
Nanofiber Technology

Heavy-Duty By-Pass System (BMK-30)

By-Pass Diagram Reference Resource Library
Installation and Servicing Instructions - pdf

slide JSProduct Description
The AMSOIL Heavy-Duty By-Pass Filtration System (BMK30) provides superior filtration performance for heavy-duty on- and off-road applications. The BMK30 is designed specifically for the Heavy-Duty Ea By-Pass Filter (EaBP120), bringing Ea synthetic nanofiber technology to the heavy-duty market.

The BMK30 is made from high-quality cast aluminum with a steel filter spud that has been thoroughly tested in on-road and severe off-road service. The mount is finished with a thick layer of powdercoated paint to provide maximum resistance to the degrading effects of road salt, debris and engine compartment chemicals. In addition, BMK30 By-Pass Filtration Systems can be plumbed in a series to provide maximum filtration protection for large V12 and V16 engines. The filter mount features a 3⁄8" NPT connector that connects the outlet and inlet of adjacent filter mounts. For more information on engine adapters or the installation of multiple by-pass systems on one application, contact AMSOIL Technical Services at (715) 399-TECH.

The EaBP120 features the same synthetic nanofiber media as the rest of the Ea By-Pass Filter family. The EaBP120 removes 98.7% of all contaminants two microns in size or larger (ISO 4548-12), and provides an industry-leading soot-removal efficiency of 39% for particles less than one micron in size (ISO 23556). It comes complete with a marine powder-coated finish for long filter life, even in extreme conditions. AMSOIL recommends changing the EaBP120 every other full-flow filter change up to 90,000 miles.Extended oil drain intervals should always be accompanied by an oil analysis program.

Competitive Pricing
The AMSOIL BMK30 and EaBP120 provide state-of-the-art filtration performance at a price hundreds of dollars less than the competition. Similar products from competitors such as Gulf Coast, Spinner Centrifuge, Oil Purification System, Advanced Filtration Solutions and Cleantechnics, with no hoses or fittings, range in price from $500 to $1,000. AMSOIL provides superior filtration performance for considerably lower cost. In addition, each new BMK30 comes with a certificate for one free oil analysis from OIL ANALYZERS INC.

The AMSOIL BMK30 and EaBP120 provide maximum filtration performance for virtually all heavy-duty diesel applications, including Class 6, 7 and 8 heavy-duty trucks, off-road equipment, buses, generators, marine engines, logging and agricultural equipment.

The AMSOIL BMK30 and EaBP120 are now available. For further application information, consult the AMSOIL Online Product Application Guide at The BMK30 comes with all necessary hose-end fittings and mounting bolts, but does not include the filter, hose or engine adapter fittings. The hose and engine adapters are not included due to the kit’s high variability of application. Before installing a BMK30 kit, determine where the filter mount will be located and how much hose will be necessary to complete the installation. The installer must also determine the size of the high- and low-pressure ports in order to determine which engine adapters to purchase. Hose is available by the foot from AMSOIL (BP250), and adapter fittings can be purchased from any hydraulics or heavyduty equipment outlet.


- Replacement Chart - By-Pass Filters

- Application Chart - By-Pass Filters

By-Pass Filter Replacement Components