Bypass Oil Filters

Engineered for Outstanding Oil Filtration Efficiency

AMSOIL Bypass Oil Filters provide maximum filtration protection against wear and oil contamination. Working in conjunction with the engine’s full-flow oil filter, AMSOIL Bypass Filters operate by filtering oil on a “partial-flow” basis. They draw less than 5 percent of the oil sump’s capacity at any time and trap the extremely small, wear-causing contaminants that full-flow filters can’t remove. AMSOIL Bypass Filters typically filter all of the oil in the system several times an hour, so the engine continuously receives analytically clean oil.

Higher Efficiency

The 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. The Bypass Filters feature a nitrile HNBR gasket, a silicone anti-drain valve and proprietary high-efficiency media.

Filter Service Intervals

Bypass Filters offer long service life. Do not exceed the limits listed in the chart below.

Increased Oil Capacity

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