The Original Synthetic Motor Oil

New AMSOIL Heavy-Duty By-Pass System

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In May, AMSOIL unveiled its new by-pass filtration mounts, which included a number of improvements to an already superior product, such as better oil flow and more durable spin-on adapters. Now, AMSOIL also offers the same technology for heavy-duty applications. The new AMSOIL Heavy-Duty By-Pass Filtration System (BMK30) and AMSOIL Heavy-Duty Ea By-Pass Filter (EaBP120) offer maximum by-pass filtration performance for heavy-duty applications.


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.


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

  • Extended oil drain intervals with oil analysis
  • More convenient and economical option for heavy-duty by-pass filtration
  • Improved oil cooling through increased fluid system capacity
  • Small-particle soot removal
  • Easy installation
  • Equipment constantly runs on clean oil, significantly extending engine life

The AMSOIL BMK30 and EaBP120 provide state-of-theart filtration performance at a price hundreds of dollars less than the competition. At Preferred Customer pricing, an AMSOIL BMK30, EaBP120 and 10 feet of hose is $213.75. 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. 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.

AMSOIL By-Pass Filtration Products

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