Pair AMSOIL Synthetic Motor Oil

The function of oil filtration is to remove contaminants introduced into the lubricating oil and prevent them from reaching sensitive...

September 8, 2015

The function of oil filtration is to remove contaminants introduced into the lubricating oil and prevent them from reaching sensitive engine parts – without restricting normal oil flow to the various points requiring lubrication. Two primary types of oil filtration are available: full-flow and bypass.

Full-Flow Oil Filtration

Full-flow oil filters install directly into the line of oil circulation; the oil passes through the filter as it travels between the oil pump and the engine. A full-flow oil filter must remove and hold contaminants without obstructing oil flow to the engine. Because they use a thin layer of porous filter paper, most oil filters on the market compromise the filtration of finer materials. Such filters have almost no extended cleaning ability because they have a low capacity for storing dirt.

These “surface-type” paper filters quickly become restricted as debris builds up on the surface, at times forcing the filter bypass valve to open and allow unfiltered oil into the engine.

Bypass Oil Filtration

Because oil must be filtered quickly while removing most of the particles, the average full-flow filter traps particles as small as 20 microns. Bypass oil filtration uses a secondary filter with the purpose of eliminating nearly all contaminants in motor oil. Bypass filters have high capacities and eliminate much smaller particles than full-flow filters, including those in the two to 20 micron range, as well as soot and sludge. They reduce engine wear and increase oil volume, but their high efficiencies mean they also have higher restriction and must be used in conjunction with a full-flow filter.

Bypass filters operate by filtering oil on a “partial-flow” basis. They draw approximately 10 percent of the oil pump’s capacity and trap the extremely small, wear-causing contaminants that full-flow filters can’t remove. The continual process cleans the oil, reducing long-term wear and helping extend oil life.

AMSOIL Ea Oil Filters

AMSOIL Ea Oil Filters feature advanced full-synthetic media, making them one of the highest efficiency filters available for the auto/light-truck market.

  • Provide filtering efficiency of 98.7 percent at 20 microns
  • Offer greater capacity than competing filter brands
  • Allow maximum efficiency without restricting flow
  • Provide extended service life

AMSOIL Ea Bypass Filters

AMSOIL Ea Bypass Filters provide the ultimate in protection against wear and oil degradation in auto/light-truck, heavy-duty and other applications.

  • Provide filtering efficiency of 98.7 percent at two microns
  • Offer improved oil filtration for prolonged engine life
  • Allow increased oil capacity
  • Provide extended service life

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