AMSOIL Bypass Oil Filters & Kits
We offer the best AMSOIL By-pass filtration advice but please see all below to help pinpoint what you will need for your application. We are building a new database with parts and full descriptions.
We are the king of AMSOIL bypass filter sales. All parts and kits are in stock, and we have the quickest turnaround time. Let us box you up a year supply of replacement filters to save you money today!
Last year several kits were added. Please review these kits on the following list but call us at 800-579-0580 for the best total should you want to order. We are here to answer your questions!!
Overview Video
Extending oil life is only a part of the benefit. In all vehicles these kits help you control the most damaging wear and soot particles. All competing filters use older cellulose/resin technology and expensive replacement canister filters. A NO-GO with your budget.
AMSOIL’s Bypass units feature high capacity Nanofiber based spin-on filters designed to last up to 120,000 miles or 2-years whichever comes first. Estimated filter change intervals and drains are based on decades of used oil analysis data. Use our prepaid (w/ postage) Oil Analysis kits to extend oil & filter life even further. (Order KIT-02)
Why The Synthetic Warehouse for your AMSOIL Purchase? We sell more bypass kits than anyone else. Called in orders save more. 800-579-0580
Reasons for By-Pass Filtration
- Extend Oil Drain Intervals
- You save money because you are changing your oil less often all based on professional analysis lab tests. With Amsoil Synthetic Oils you use even less. A typical engine with less than 100,000 miles using our
- Excellent for that remote stationary engine or that vehicle you will have to rely on when service time is not an option.
- Improved oil cooling
- Your engine will run cooler, which helps to reduce wear on your transportation investment
- Increased filtration capacity and life
- Your oil is filtered more effectively and efficiently, thus removing more wear particles and reducing the contaminants that cause damage to your engine. Engine life is extended when oil remains analytically clean.
- Increased fluid system capacity
- Your engine has more oil available to lubricate, cool and protect your engine, once again extending the life of your engine. More oil reduces TBN reduction and can battle acids from soot and deposits better in older cars and diesels.
- Small particle and soot removal efficiency
- Removes more small particles and soot contaminants that can cause engine wear and premature damage to your engine. Filters particles less than 1 micron in size and 100% down to 2. You will get more use out of the investment. More on soot below.
- Decrease disposal costs
- Reducing the potential harm to our environment and further reducing dependence on foreign oil.
- Engine efficiency increased
- This can help you receive better mileage because the added capacity and removal of soot allows the oil to perform several functions past its half-life; which of course saves you money!
- Rejuvenate an unknown engine
- Safely clean-up deposits from an abused or improperly maintained engine in used cars. #1 reason for install as you can halt or reverse the loss of efficiency to any motor as well as reduce blow-by (crankcase ventilation problems) and other problems which occur in older neglected vehicles. Great for vintage vehicles as well.
SOOT REMOVAL:
AMSOIL Ea By-Pass Filters remove 39 percent of soot contaminants less than one micron. Soot removal efficiency can increase approximately 10 to 14 percent when Ea By-Pass Filters are used in conjunction with a standard full-flow filter, even higher in conjunction with Ea Filters or Donaldson Endurance filters.
The Dangers of Soot
The combustion process in diesel engines creates soot. After fuel is injected, combustion occurs, producing soot as a by-product. The combustion particulates then become trapped on the exposed oil film. The rings wipe the particulates into the oil and the fine particulates aggregate, increasing levels of soot in the oil. Oil with dispersant additives will generally keep soot in the range of 0.002 to 0.5 microns in suspension. As the amount of soot suspended in the oil increases, the performance of these additives decreases.
Soot Causes Wear
As dispersants in the oil are consumed, soot particles grow to a size that causes problems. This creates a direct correlation between wear and soot concentration; the higher the concentration of soot, the higher the level of wear (see graph).
Today’s oil manufacturers are extending oil life by holding higher concentrations of contaminants, including soot, in suspension in the oil. They are also increasing fuel economy by reducing oil viscosity and oil film thickness, therefore reducing the critical contaminant size. (Small contaminants are more critical to filter out)
This further necessitates the use of by-pass filtration, especially in diesel engines.
New BMK-30 kit for heavy duty use – single bypass mount for the larger EABP 120 Bypass oil filter. Call for parts and pricing. This is a LARGE unit for high capacity oil sumps – Class 7, 8 and large generators. Download our data sheet OR See our BMK-30 expanded section here!
How to use this page!! We sell a lot of bypass units. Sometimes one per day. but we also get a lot of the same questions so here is the answer.
1. Read over the page to see what kits works best for you. Kit Descriptions start 1/2 way down the page.
2. Review the install & servicing instructions which all are located 3/4 of the way down the page.
3. For pricing it’s best to call 800-579-0580 but AMSOIL only allows pricing to be displayed through the main online store but again, this is retail. You must call for best price.
To get the best price on the kits, call me OR enter the store and select the preferred customer option. Add that option to the cart then cost pricing will appear. Make note of part numbers.
It may be easier and faster to call me so you don’t miss a part.
4. Don’t be afraid to call late. We are a top dealer because we like to talk to our customers. We operate 9AM to 7PM M-F and when we can Sat & Sun.
5. Most applications you have the choice for the single or dual units. I personally like the single as the full flow is the OEM design (our AMSOIL EAO-Oil filter) and they are generally easier to find a mounting location. The dual are of the highest quality and are best for installs where the stock filter is in a bad location for service. The dual does deliver 100% of the oil back to the oil galleys.Pricing – This link to the Bypass kits in the online store will show you retail on-line pricing but just by calling 800-579-0580 or joining as a preferred customer instantly saves you 20% or more.
New Quality Parts – All the dual kits which use the adapter to remote the factory oil filter have been updated. The photo above shows that improved part in the center display. The bolt on adapter uses a hardened & polished aluminum ring meaning better machine work for better oil flow and longer life. No cracking or leaks.
Oil Analysis – This is just as important to the protection AND reducing the old and outdated ‘scheduled maintenance’ way of doing things we added a page to further help you understand what Oil Analysis is all about. (Bypass Kits come with a free Oil Analysis voucher)
The Filter Elements
Celebrating 26 years of our Bypass filter line see the latest Ea “Absolute Efficiency” line of bypass filters. Please click here for more information on the spin on units – 100% efficient at 2-microns.
Engine wear is caused by dirt particles larger than 5 microns. The updated AMSOIL Bypass Oil Filter is 100% efficient at 2 microns. The updated housings offer greater flow and quality, and better cold temperature filtration. AMSOIL has the best selling bypass (parasitic filtration) kits because of their low cost and ease of use. Makes it easy to eliminate engine wear in all your cars. Other advantages include protection against acid causing soot, carbon, varnish, and other oxidation components.
Upgrade your air filter too and enhance your wear reduction strategy! just by getting rid of those “oil wetted gauze” air filters, you significantly decrease engine oil contaminates. Please try the AMSOIL Absolute Efficiency, cold air induction, and racing/street rod air cleaner configurations.
AMSOIL’s Bypass filters monitored through a oil analysis program have been proven to allow AMSOIL synthetics to maintain proper oil viscosity for extended periods, often beyond 150,000 miles in average gasoline and diesel vehicles. These filter systems save time and money while reducing the potential for used oil contamination in the environment. When using AMSOIL engine oils, generally change Ea Full flow oil filters at 1-year intervals (or 25,000 miles) and the new EaPB every other full flow filter change or 60,000 whichever comes first!
An old but great vintage AMSOIL video made by the Tech Services director Dave Anderson. Dave is the father of the bypass filter and other AMSOIL innovations. One of the best guys you will ever meet. This unit is an older filter. The current filters have 2X the capacity thanks to Donaldson’s nanofiber.
See the list of Bypass Install Photos
also AMSOIL Marine Grade Bypass Filtration System
Vehicle applications at bottom of page with illustration links! See Chart.
Bypass Filter Kits To Order
The AMSOIL Bypass filter kits come in several variations. When selecting, please see the chart below or call us directly at 1-800-579-0580. We sell several weekly so we can help you get what you need quickly. I personally prefer the Single BMK-21 for almost all applications.
The BMK-23 us the universal dual remote (full flow and partial flow).
The BMK-26, 27 and 28 kits are dual units designed for the main selling diesel pick-ups and BMK-31, 32, 33 and 34 kits are the single units for the same popular diesel pickups.
For those wanting to add a bypass filter to smaller vehicles with limited space or if you do not want to relocate your current filter, use the BMK-21 (Overview drawing), which is the bypass only. We have many Volkswagens, Toyota, and other compact engine compartment’s housing these.Follow this link to read about the latest filter element!!
See some of the install photograph links towards the end of this page. We know the parts you need so call or email for assistance 1-800-579-0580.
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| Frame Mount 1 |
Frame Mount 2 Offers improved cooling |
Under Hood Mount 1 Most Common |
Don’t forget to view the install pictures listed below!!
PRODUCT DESCRIPTION
The AMSOIL Bypass Oil Filter provides the best possible filtration protection against wear, oil degradation, rust and corrosion. Working in conjunction with the engine’s full-flow oil filter, the AMSOIL Bypass Filter operates by filtering oil on a “partial-flow” basis. It draws approximately ten percent of the oil at any one time and traps the extremely small, wear-causing contaminants and water that full-flow filters can’t remove. The AMSOIL By-Pass Filter typically filters all the oil in the system several times an hour, so the engine continuously receives analytically clean oil. Useful for fleets and the daily commuter.
Extend oil changes even further with our oil analysis testing. GO beyond 100,000 miles
PARTS SUMMARY
The key to these kits is to first read the installation instructions. Please download and print the PDF copies found in the sections below.
If ordering the BMK-23 Universal Dual Remote (Bypass filter with full flow together) you must order the correct Spin-on Adapter to match the filter thread of your engine. This improvement results in better chemical resistant sealing and easier installation as well as larger hose. See Diagram F in BMK-23 Instructions. Call for price.
BK295……. 3/4″-16
BK296…… 13/16″-16
BK297…… 18mm x 1.5mm
BK298…… 20mm x 1.5mm
BK299…… 22mm x 1.5mm
BK300…… 1″-16
BK301…… 1-1/2″-16
BK302…… 13/16″-16If your equipment uses This is the thread used This is the adapter
this AMSOIL Filter on that equipment kit you should use
Adapter to choose with BMK-23(call if you don’t see yours here) If your equipment uses this AMSOIL filter This is the thread used on that equipment This is the adapter kit you should use. Ea15K-10 3/4″ – 16 BK-295 EaO-11 22mm x 1.5mm BK-299 Ea15K13 20mm x 1.5mm BK-298 EaO-15 3/4″ – 16 BK-295 EA15K20 20mm x 1.5mm BK-298 EaO-22 13/16″ – 16 BK-296 EaO-23 18mm x 1.5mm BK-297 EaO-24 13/16″ – 16 BK-296 EaO-25 13/16″ – 16 BK-296 EaO-26 3/4″ – 16 BK-295 Ea15k29 18mm x 1.5mm BK-297 EaO-30 13/16″ – 16 BK-296 Ea15k-32 13/16″ – 16 BK-296 EaO-34 3/4″ – 16 BK-295 EaO-36 20mm x 1.5mm BK-298 EaO-42 3/4″ – 16 BK-295 EaO-44 20mm x 1.5mm BK-298 Ea15k50 22mm x 1.5mm BK-299 * Ea15K51 3/4″ – 16 BK-295 EaO-52 13/16″ – 16 BK-302 (Special Duramax Unit) EaO-64 13/16″ – 16 BK-296 EaO-80 1″ – 16 BK-300 (Cummins unit) EaO-96 3/4″ – 16 BK-295 EaO-99 1&1/2″ – 16 BK-301 (7.3 Powerstroke only) 13/16″ – 16 (Duramax 6.6 L) BK-302 (Durmax 6.6L) Note: When ordering the BMK23:
– Spin-on Adapter BP402M is designed for 2008-Present Chevrolet 1500 & 2500 gas engines.22mm x 1.5mm Overrides BK-299 New Kits all come with a Pre-paid oil analysis card for one free used oil analysis.
If ordering the BMK-21 Single By-Pass Kit (Best seller and best for tight spaces) you may also need the following parts:
BP-67 Oil Sampling Petcock valve
BP-89 Return Line Swivel Fitting and BP-242 90* angle adapter
BK-1201, 1301 or 1101 Aluminum billet oil fill cap (custom for diesel trucks)
BP-44 oil sending unit adapter for Japanese cars
BP-45 oil sending unit adapter for European cars
EABP-90, EABP-100 or EAP 110 Bypass Filter
And the proper AMSOIL EAO Full Flow oil filter
BMK-23,26,27 and 28 replace the existing filter remotely along with the bypass. (scroll further down) |
Typical Installation Diagram for BMK-21, BMK-22 & 30 Kits.SEE BMK-23 Below. It is the dual unit with the adapter. |
- BMK-21 Installation and Servicing Instructions (was BMK-11)
- BMK-21 Drawing
- BMK-22 Installation and Servicing Instructions
- Also available – oil fill cap return swivel adapter. (see in parts list)
- BMK-30 Kit See the rest of the kits (dual) further down.
| By-Pass Filter Photos (pass over to see description) | |||||
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In the photo on the right, the filter dimensions include the distance needed for removal.  |
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New Aluminum Billet Oil Fill and Oil Filter Caps for BMK11 By-Pass Filtration System
Engine compartments are becoming increasingly cramped, leaving little room for after-market additions and improvements. The BMK21 is a single remote by-pass filter system that fits into much smaller spaces than the AMSOIL Dual-Remote By-Pass System. Ford 6.0L Power Stroke™ Diesels BMK-31 Dodge 5.9L Cummins Diesels BMK-34 General Motors 6.6L Duramax Diesels BMK-32 The Sandwich adapter is an anodized billet aluminum adapter that screws on to the present full flow oil filter nipple located on the engine block. The full flow filter is then simply spun on to the adapter. The Sandwich adapter has an orifice to provide high-pressure oil feed for the BMK21. Like the other diesel applications, AMSOIL now offers an Aluminum Billet Oil Filler Cap for (BK1202) to ease the installation of the oil flow from the BMK21 back to the engine. To complete an installation, the following components must be purchased separately:
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AMSOIL now offers new by-pass components to ease the installation of the BMK21 By-Pass Filtration System in three popular diesel engines: the Ford 6.0L Power Stroke™, the Dodge 5.9L, 6.7L Cummins and the General Motors 6.6L Duramax.AMSOIL By-Pass Filter Replacement Chart
| Type of Unit | Stock Number | Size (Approx.) | Additional Oil Needed | Crankcase Capacity | Applications |
| SINGLE SPIN-ON ELEMENT
(Used with BMK-21 or any DUAL REMOTE SYSTEM) |
EaBE-90 | Diam. = 4.5 in. Height = 6 in. With Mnt. = 8 in. |
1 qt. | up to 9 qt. | Pleasure Vehicles, Light Trucks and Smaller Commercial Applications |
| EaBE-100 | Diam. = 4.5 in. Height = 8 in. With Mnt. = 10 in. |
1.5 qt. | up to 15 qt. | ||
| EaBE-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-22 DUAL-GUARD) |
(2) EaBE-90’s | Diam. = 5 in. Height = 9.5 in. With Mnt. = 8 in. |
2 qt. | 15 to 18 qt. | Large Trucks, Construction, Farm and Industrial Equipment
(minimum sump capacity = 15 qt.) |
| (2) EaBE-100’s | Diam. = 5 in. Height = 9.5 in. With Mnt. = 10 in. |
3 qt. | 15 to 30 qt. | ||
| (2) EaBE-110’s | Diam. = 5 in. Height = 9.5 in. With Mnt. = 12″ |
4 qt. | 15 to 42 qt. | ||
| SPIN-ON ELEMENT
(Used with BMK30 |
(1) EABP120 | Width = 5.35 in. Length = 12.12 in. Height = 17.5 in. |
4 qt. | 15 to 42 qt. | Large Trucks, Construction, Farm and Industrial Equipment, (minimum sump capacity = 15 qt.), the BMK30 kit can be mounted in series for sump capacities greater than 42 quarts. |
| Normal Service Life:When used in conjunction with AMSOIL motor oil and an EaO or Donaldson Endurance filter, the EaBP should be changed every other full flow filter change up to 60,000 miles. 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. | |||||
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
NOTES:
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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.”
- Installing the Dual Remote By-pass system will result in a slight vibration sound on some applications. No harm to the engine will occur. Contact us for instructions before installing on vehicles with cast aluminum oil pans. (BMK-21 concern. We have a special return for this application)
Optional Parts Lists & replacement items
We recommend ordering the BK-13 drain valve for your oil sampling. Order the BP-67 for BMK-21 and BMK-22) You should call us at 800-579-0580 so we can go over any additional parts you may need.Main Instructions – great material to help you decide which kit is best for you.
- BMK-21 Installation and Servicing Instructions – Single Bypass mount kit which we prefer for most installs. Also for 2004 and later Dodge 5.9 TD. See this DATA Sheet for more information.
- BMK-22 Installation and Servicing Instructions – Dual Bypass Filter Unit. Designed for large capacity systems.
- BMK-23 Installation and Servicing Instructions – Dual Universal Remote Kit – Relocating filter and Bypass
- BMK-26 Installation and Servicing Instructions – Powerstroke Kit
- BMK-27 Installation and Servicing Instructions – Chevy/GMC Duramax Kit
- BMK-30 Installation and Servicing Instructions – Heavy Duty By-Pass System. Class 6,7,8, off-road & more. And the dedicated page for more information – BMK-30 Bypass for Over The Road Trucking Overview
- New parts to adapt for Ford Powerstroke 6.0
- New Single Bypass Sandwich adapter for Duramax!
Call 1-800-579-0580 for price and parts needed.
Jeep Cherokee install – BMK-21 and oil return to cap.
By-Pass Custom Installation photos and descriptions
2007 Subaru Legacy Forester bypass install photos
See the full database of photos by clicking here (but buy through us for best price and support)
Ford Powerstroke install photos:
2001 F-450 install photos Power Stroke Diesel
2000 Ford E-350 Van with a 7.3 Powerstroke Diesel
2001 Ford F250 Superduty with a 7.3L Diesel
2001 Ford F-SuperDuty Pickup 7.3 PowerStroke Diesel using the BMK-11 single unit
2002 Ford F150 Supercrew 4×4 – Great detail
2005 & 2006 Powerstroke 6.0 using the BMK-11 (New Adapter and mount Available)
The Ford 6.0 is one of AMSOIL’s #1 customer bases. The HDD 5W30 and our bypass kits solve a number of heat, soot and mileage issues. If you have a Ford 6.0 call us and at least try the HDD 5W30 and Diesel fuel additive then consider our Bypass get up.This bracket we sell makes adding a bypass kit to the 6.0 FORD Powerstroke the easiest one!
6.5, 6.6 GMC Duramax and Others By-Pass install photos:
2005 Duramax install – Simple usage
2005 Chevrolet Silverado (New 2012 version install)
2002 Chevrolet 2500 HD Silverado Crew Cab Pickup
2001 GMC 2500 HD 6.6 diesel
Cummins install photos:
2002 Dodge Ram 2500 Laramie with a 5.9L Cummins
2001 Dodge Ram 2500 5.9L HO Cummins
2001 Dodge/Cummins using single BMK-11 (now order BMK-21)
1998 Dodge Ram Cummins Bypass – Substitute with single unit BMK-21 now
(Our #1 customer base is Dodge 5.9)Other AMSOIL Bypass kit install photographs
2007 Toyota Tundra Install – We sell a LOT of these to Toyota truck owners. Both the single and dual units (BMK-21 or 23)
2010 Dodge Ram 2500 install
1994 Dodge Caravan Bypass Install *New
2007 Subaru Legacy Forester bypass install photos
BMW 325I Single install – Easy use of space!
1981 BMW 528i – New (2012) install – great work and custom bracket.
1994 Dodge Caravan Single Bypass.
2004 Chevrolet Impala LS 3.8L V6 BMK-13 install – Excellent project!
2005 Ford Expedition – Very simple BMK-13 install
2003 Dodge Ram 4.7L engine
This By-Pass was installed without drilling any holes and no additional custom bracket or adapters. Excellent and simple install.
2001 Chevy Cavalier 2.2L I4 – Neat compact installation making a excellent car even more reliable while simplifying oil changes for the family.
2002 Jeep Wrangler 6-Cyl. – One of our most popular vehicles to add the By-Pass system to. I also added a Jeep Cherokee which I did the install on.See how the filter (BMK-13) was installed in Dealer -Fred Hubert’s Tundra!
1988 Olds Cutlass uses BMK-11 – Simple and low cost protection!!!
New: VW Golf – BMK-11 Install
Also see this Kenworth fleet test using the BMK-12 and Series 3000 5W30 Diesel Oil
AMSOIL Dual Guard BMK-22 General Information
Designed for heavy duty work-horse engines that have oil sumps from 16 to 42 quarts. This kit is uses two AMSOIL Bypass Filters (three sizes to choose from). Their unique internal flow spreader and follower spring system provide a non-channeling filter media system. Each Bypass unit contains stacked-disc type elements which has been shown to reduce piston ring and rod/main bearing wear 75% to 91% (Society of Automotive Engineers paper 881826).
Note: If you are interested in the BMK-22 – you may want to consider our BMK-30 which is a new kit designed to make installation easier and for the same results using a single large bypass filter. Take a look at the BMK-30 Spec sheet for a brief overview. The BMK-30 is basically a modernized version of the BMK-22.
It’s Convenient: Elements spin on and off for fast, neat filter changes.
Built-In Safety: A metering orifice inside the mount controls the 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-Guard Bypass Filter cleans all of the oil in the system every 5 – 10 minutes (depending on engine RPM, sump size, and oil pump ratio).
The BMK-22 Mounting Kit: The BMK-22 kit contains a mount, mounting hardware, a restriction fitting, and two 3/4″-16 to 1/4″ JIC fittings (Please see link above with parts list). Complete installation instructions are included, along with an additional parts list of plumbing hose and fittings available separately from us or your Commercial account. Spin-On filter elements should be bought separately in pairs based on sump size or available space in the engine compartment. The following is merely a overview, since the larger the element used, the less frequently it will have to be changed.
- For a crankcase sump of 15 to 18 quarts, use two (2) BE-90 filter elements.For a crankcase sump of 15 to 30 quarts, use two (2) BE-100 filter elements.
- For a crankcase sump of 15 to 42 quarts, use two (2) BE-110 filter elements.
Your AMSOIL By-Pass Filters will last twice as long as your regular filter, so change them only half as often.
Other Applications for AMSOIL’s Dual Guard:
- Stationary Engines
- Large Industrial Compressors
- Diesel Electric Generators
- Irrigation and Farming motors
- Marine
The AMSOIL Bypass filter kits are a low cost way to extend engine life, save time, reduce maintenance and protect the environment.
BMK-21 recommended to replace all Studebaker factory bypass filter units.
As a Studebaker owner I will have some photos and results soon but if you would like to discuss the product we have to upgrade your Studebaker bypass filtration system which is about the most simplest installation possible with these kits, please call me. I would suggest calling to take a current oil sample then after the installation of the kit sample again to see the results of superior bypass filtration.
Ches Cain – AMSOIL Regency Direct Jobber
1-800-579-0580