Bypass Filter

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Clean oil always performs better

Bypass oil filter system

Bypass oil systems

How adding a second sump bypass filter works

Bypass oil system is an oil sump filter functioning as a secondary filtration with the purpose of eliminating soot and small particle contaminants from motor oil. AMSOIL filters offer high holding capacities with a service life of one to two years, continuously removing soot and other particles too small for the full-flow filter. Continuously clean engine oil from the bypass sump filter system means oil can remain in like new condition longer returning analytically clean oil to the engine.

Bypass sump filter removes even the smallest contaminants

It’s proven time and time again that engines wear faster when the oil is dirty. Even oil that has been recently changed can have contaminants suspended in it, wearing on bearings and cylinder walls. It reduces your engine’s lifespan and requires serious repairs sooner than it should. Your oil sump filter or bypass filter drastically improves the condition of your engine oil by removing contaminants like carbon, soot, and sludge to keep your truck or equipment operating more efficiently and cleaner, not to mention more reliably.

For bypass oil filters, AMSOIL has the best options available to keep your oil working at its full capacity. With four options to cover almost any application, the leader in synthetics is also the leader in oil filters of all kinds.

Benefits of using a bypass oil filter

Clean bypass filter elements offer significant improvement compared to full-flow filters alone. Oil that’s been filtered by a bypass system keeps oil analytically clean, similar to oil after you flush diesel engines of the sludge and carbon buildup. In analytically clean condition, the TAN levels are reduced and oil lasts longer. As well:

  • A clean bypass oil filter element cycles through the oil every hour.
  • Diesel engines are protected from soot buildup that etches into cylinders and pistons.
  • Working alongside full-flow filters, AMSOIL bypass filters clean oil far better than industry standards.
  • Oil consumption is reduced since clean oil seals pistons against cylinder walls better.

Save more with an AMSOIL commercial account

Save money on oil filter bypass elements and AMSOIL synthetic oils and fluids by creating a commercial account today. With applications for all industries including farming, industrial, construction, trucking, or others, you’ll have access to premium oil, oil filtration, lubrication, and related products at a preferred rate with a commercial account.

Efficient 98.7 percent at two microns
Equipment constantly runs on clean oil
Increased engine efficiency
Significantly extend engine life
Increased filtration capacity and life
Improved oil cooling
Increased fluid system capacity
Extended drain intervals

EaBP elements service life chart

Ea® stock code >> EaBP90 EaBP100 EaBP110 EaBP120
Service Time (Year) 2 years 2 years 2 years 1 year
Service Time (Hours) 600 800 1200 1800











Element Dimensions
Height 5.78″ 7.25″ 10.35″ 12.1″
Diameter 4.25″ 4.25″ 4.25″ 5.35″

How to tell when it’s time to change the bypass filter element

Regular oil analysis can indicate how effective the engine oil itself is, but how can you tell when a bypass filter element needs to be changed? When the filter is hot to the touch, it’s an indicator that oil is still flowing freely through the bypass system and the filter is still performing its duties efficiently. If the bypass filters are cold, the hot engine oil is no longer circulating through and it’s time to change the bypass filter.

Of course, the best option is an AMSOIL Ea Bypass Oil Filter, and one of the four options will fit your application perfectly.

Why choose the AMSOIL® brand

Engineered for outstanding oil filtration efficiency

Higher Efficiency

AMSOIL Bypass Filters have an absolute efficiency of 98.7 percent at two microns. This highly efficient filter provides exceptional filtration performance, removing all the particles known to reduce engine life.

Superior Construction

AMSOIL Bypass Filters have a marine powder-coated exterior and an anti-corrosion coated base plate to provide excellent corrosion protection. AMSOIL Bypass Filters feature a nitrile HNBR gasket, an orange silicone anti-drain valve and proprietary high-efficiency media

Soot Removal

AMSOIL has designed a high-efficiency bypass filter element that is also a soot removal device. AMSOIL Bypass Filters use proprietary high-efficiency media. This media removes soot particles two microns and larger, eliminating abrasive wear from soot agglomeration.

Increased Oil Capacity

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

Oil sump capacity chart for filter application

Type of unit Part
Oil Needed
OEM/ Engine Sump
Single Element
—- —- —- —-
Use with Single-Remote or DUAL-Remote systems EABP90 1 qt. up to 15 qt. Pleasure Vehicles,
1/2 Ton to 1-Ton Trucks and
small Commercial
EABP100 1.5 qt. up to 18 qt.
EABP110 2 qt. up to 24 qt./ 6.0 gal.
DUAL (2) Element
Use with BMK22
2 qt. 15 qt. -to- 7.5 gal. Large Trucks,
Construction, Farm,
Industrial Equipment
3 qt. 15 qt. -to- 9 gal.
4 qt. 15 qt. -to- 12 gal.
Single Element
Use with BMK30 Only EABP120 4 qt. 6 gal. -to- 15 gal. Large Trucks,
Construction, Farm,
Industrial Equipment

The primary benefits of an AMSOIL Bypass Filter System is to reduce mechanical wear, remove soot, control cylinder deposits and reduce lubricant replacement cost. Adding a bypass oil filter is a simple and most effective solution to keep any brand of engine oil clean. Clean oil can not only remain in service longer but also helps maintain engine efficiency and performance.

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