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General Use Dual Remote Oil Bypass Unit

Product Code: BMK23

Combines Full-Flow and By-Pass filtration on a single, easy-to-install mount. All installation parts except filter spin-on adapter are included. Must purchase the spin on adapter that matches the filter thread on your vehicle. Without filter elements - 2 required. One full flow filter EAO15 or EAO26 and one of  EaBP90, EaBP100 or EaBP110 bypass element. Spin-on Adapter BP402M is designed for 2008-Present Chevrolet 1500 & 2500 gas engines.

The Ea By-Pass Oil Filter (EaBP) provides the best possible filtration protection against wear and oil degradation. Working in conjunction with the engine's full-flow oil filter, the AMSOIL Ea By-Pass Filter operates by filtering oil on a "partial-flow" basis. It draws approximately 10 percent of the oil pump's capacity at any one time and traps the extremely small, wear-causing contaminants that full-flow filters can't remove. The AMSOIL Ea Bypass Filter typically filters all the oil in the system several times an hour, so the engine continuously receives analytically clean oil

Data Sheet

Typical Installation Diagram for BMK23 Kit.

Click on diagram for larger image (Opens a new browser window)

BMK23 Installation and Servicing Instructions

See the By-Pass Replacement Parts Lists

AMSOIL By-Pass Filter Replacement Chart

By-pass installations 

By-Pass Filtration System Application Guide

Higher Efficiency

AMSOIL EaBP Filters have an efficiency of 98.7 percent at two microns. At normal operating RPMs the EaBP Filter will filter all of the oil in a typical five quart sump in less than 10 minutes.

Superior Construction

The superior construction of AMSOIL EaBP Filters provides better sealing and increased longevity along with superior corrosion resistance. AMSOIL EaBP Filters have a marine powder coated exterior; and their zinc-dichromate base plates increase rust protection. EaBP Filters have a nitrile HNBR gasket and an orange silicone anti-drain valve. The two stage pleated and layered cellulose/full synthetic media has an efficiency rating of 98.7 percent at two microns.

Longer Lasting

When used in conjunction with AMSOIL motor oil and an AMSOIL EaO or Donaldson Endurance filter, the EaBP90, 100 and 110 Filters should be changed every other full-flow filter change up to 60,000 miles or one year whichever comes first. When used with other brands of motor oil or full-flow filters, the EaBP Filter should be changed every other full-flow filter change. AMSOIL recommends using oil analysis when extending oil drain intervals.


AMSOIL recommends changing the EaBP120 every other full-flow filter change up to 90,000 miles or one year whichever comes first. Extended oil drain intervals should always be accompanied by an oil analysis program.

Increased Oil Capacity

The increased fluid system capacity and filtration life provides improved oil cooling and ensures that equipment constantly runs on clean oil. Engine efficiency is increased, providing extended engine life. 

Soot Removal

AMSOIL has designed a high-efficiency by-pass filter element that is also a soot removal device. AMSOIL Ea By-Pass Filters use a synthetic/cellulose sandwiched media. The inner layer of the element is composed of a highly efficient cellulose media covered with a full synthetic media outer layer. These filters remove 39 percent of soot contaminants less than one micron. Soot removal efficiency increases approximately 10 to 14 percent when the EaBP Filter is used in conjunction with a standard full-flow filter.

By-Pass Filtration Benefits

  • Dramatically Extended Drain Intervals

  • Improved Oil Cooling

  • Increased Filtration Capacity and Life

  •  Increased Fluid System Capacity

  • Efficient Small Particle and Soot Removal

  • Significantly Extended Engine Life

  • Equipment Constantly Runs on Clean Oil

  • Increased Engine Efficiency

  • Remove Particles Less Than One Micro

Bypass filter elements
EaBP90 Filter
EaBP100 Filter
EaBP110 Filter

Thread Adapters

If your equipment uses
this AMSOIL Filter
This is the thread used on that equipment This is the adapter you should use  
EaO11  M22 x 1.5  BK299   
3⁄4" - 16 UNF BK295
EaO17  M22 x 1.5   BK295   
EaO18  M22 x 1.5   BK295    
EaO23  M22 x 1.5   BK295    
EaO24 13/16" - 16 UNS BK296
EaO28  3⁄4" - 16 UNF BK295   
EaO34 3⁄4" - 16 UNS BK295
EaO37 3⁄4" - 16 UNS BK295
EaO38  3⁄4" - 16 UNS BK295   
EaO42 3⁄4" - 16 UNF BK295
EaO52 13/16" - 16 UNS BK302
EaO59  13/16" - 16 UNS  BK302   
EaO64 13/16" - 16 UNS BK296
EaO80 1" - 16 UNF BK300
EaO98 1" - 16 UNF BK300  
EaO99 1-1/2" - 16 UN BK301
Ea15k09 3⁄4" - 16 UNS BK295
Ea15k10 3⁄4" - 16 UNS BK295
20mm x 1.5mm BK298
20mm x 1.5mm BK298
Ea15k20 20mm x 1.5mm  BK298
Ea15k29 18mm x 1.5mm BK297
Ea15k32  13/16" - 16 UNS  BK302    
Ea15k50 20mm x 1.5mm BK299
Ea15k51 3⁄4" - 16 BK295



3⁄4" - 16 UNF BK295   
13/16" - 16 UNS BK296
18mm x 1.5mm BK297
20mm x 1.5mm BK298
22mm x 1.5mm BK299 
When ordering the BMK23:
-Spin-on Adapter BP402M is designed for 2008-Present Chevrolet 1500 & 2500 gas engines.
1" - 16 (CUMMINS) BK300
1-1/2" - 16 (POWERSTROKE 7.3) BK301
13/16" - 16 (DURAMAX ) BK302


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