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The AMSOIL Dual-Gard By-Pass Oil Filtration System links two AMSOIL By-Pass Filter Elements together for engines with sump capacities over 20 quarts. Allows fast and simple servicing with spin-on elements.

Wear tests have shown particles of contamination in the sub-20-micron range are most harmful to rings and bearings. Most trucks are sold with a full-flow filter as their only oil cleansing unit. A study by the Milwaukee School of Engineering determined the filtering efficiency of four top selling full-flow filters compared with a BE-90 AMSOIL Spin-On By-Pass Filter. The graph above shows the By-Pass functioning at 97.6% efficiency in removing particles as small as 3 microns, a feat no full-flow filter can match.

 

The AMSOIL Ea Dual-Gard By-Pass Oil Filtration System links two AMSOIL Ea By-Pass Filter Elements together for engines with sump capacities over 20 quarts. Allows fast and simple servicing with spin-on elements.

Wear tests have shown particles of contamination in the sub-20-micron range are most harmful to rings and bearings. Most trucks are sold with a full-flow filter as their only oil cleansing unit. A study by the Milwaukee School of Engineering determined the filtering efficiency of four top selling full-flow filters compared with a BE-90 AMSOIL Ea Spin-On By-Pass Filter.

Versatility:
Accommodates any two AMSOIL Ea Spin-On By-Pass Filter Elements. Their unique internal flow director and follower spring system provide a nonchanneling filter media.

Convenience:
Elements spin on and off for fast, neat filter changes.

Protection:
The stacked disc type by-pass filter has been shown to reduce piston ring and rod/main bearing wear 75% to 91% (Society of Automotive Engineers paper 881826).

By-Pass Safety:
A metering orifice inside the mount controls oil flow so that it never draws more than 10% of the oil pump's capacity. At an engine speed of 45 mph, the AMSOIL DUAL-GARD Ea By-Pass Filter cleans all of the oil in the system every 5-10 minutes (depending on engine RPM, sump size, and oil pump ratio).

The DUAL-GARD Mounting Kit:
The BMK-12 contains a mount, mounting hardward, a restriction fitting, and two 3/4" - 16 to 1/4" J.I.C. fittings. Complete installation instructions are included along with an additional parts list of plumbing hose and fittings available from seperately from AMSOIL. Spin-on filter elements, available in three sizes, should be purchased seperately in pairs based on sump size or available room in the engine compartment. The following is merely a guide, since the large the element used, the less frequently it will need to be changed.

  • For a crankcase sump of 15 to 18 quarts use 2 BE-90 filter elements.
  • For a crankcase sump of 15 to 30 quarts use 2 BE-100 filter elements.
  • For a crankcase sump of 15 to 42 quarts use 2 BE-110 filter elements

Your AMSOIL Ea By-Pass Filters will last twice as long as your regular engine filter, so change them half as often.


AMSOIL Ea By-Pass Filter Replacement Chart
Type of Unit Stock Number Size (Approx.) Additional Oil Needed Crankcase Capacity Normal
Service Life b
Applications
SINGLE SPIN-ON ELEMENTS

(Used with BMK-11 or any DUAL REMOTE SYSTEM)

BE-90 Diam. = 4.5 in.
Height = 6 in.
With Mnt. = 8 in.
1 qt. up to 9 qt. 25,000 miles or 1 year

(approximately 4 times normal drain interval)

Pleasure Vehicles, Light Trucks and Smaller Commercial Applications
BE-100 Diam. = 4.5 in.
Height = 8 in.
With Mnt. = 10 in.
1.5 qt. up to 15 qt.
BE-110 Diam. = 4.5 in.
Height = 10 in.
With Mnt. = 12 in.
2 qt. up to 21 qt.
DUAL SPIN-ON ELEMENT

(Used with BMK-12 DUAL-GUARD)

(2) BE-90's Diam. = 5 in.
Height = 9.5 in.
With Mnt. = 8 in.
2 qt. 15 to 18 qt. 2 times normal oil drain interval Large Trucks, Construction, Farm and Industrial Equipment

(minimum sump capacity = 15 qt.)

(2) BE-100's Diam. = 5 in.
Height = 9.5 in.
With Mnt. = 10 in.
3 qt. 15 to 30 qt.
(2) BE-110's Diam. = 5 in.
Height = 9.5 in.
With Mnt. = 12 in.
4 qt. 15 to 42 qt.
LARGE CANISTER BY-PASS FILTERS BE-50 Diam. = 7.5 in.
Length = 10 in.
8 qt. 15 to 30 qt.
BE-75 Diam. = 7.5 in.
Length = 15 in.
12 qt. 15 to 42 qt.


a
. Filters can be used on sumps of larger capacity but then require more frequent replacement.  Full details on service life included with filter installation instructions

b. Data determined in a non-turbo gasoline engine with AMSOIL 100% Synthetic Motor Oil and AMSOIL Ea Oil Filter.  Service life varies in other engines (turbo and diesel) and with other oils and filters.

NOTES:

  1. Special adapters and hardware may be required for some installations. A universal mounting bracket is included with the kit, however, custom brackets may be required depending on your vehicle's equipment options or personal preferences in mounting locations."

  2. Contact AMSOIL INC. for instructions before installing on vehicles with cast aluminum oil pans.

APPLICATIONS

Vehicles with sump capacities up to and including 15 qts

Mount

Filter (Order separately unless noted)

BMK-11

Any size AMSOIL Spin-On By-Pass Filter Element

BMK-13

Any size AMSOIL Spin-On By-Pass Filter Element

BMK-15 Cummins Diesels (complete with filters)

SDF-26 and BE-100 Spin-On By-Pass Filter Element

BMK-16 International Diesels (complete with filters)

SDF-26 and BE-100 Spin-On By-Pass Filter Element

BMK-17 Duramax Diesels (in GM Pick-ups) (complete with filters)

SDF-26 and BE-100 Spin-On By-Pass Filter Element

 

Vehicles with sump capacities greater 15 qts.

Mount

Filter

BMK-12 Dual Guard

Any size AMSOIL Spin-On By-Pass (mount requires 2 filters and all hoses and fittings)

 
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