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Amsoil Oiling System Bypass Filter

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Amsoil's bypass-filter assembly has an incorporated spring-loaded check valve built into it. It basically directs 10-15 percent of the oil flow into the bypass filter, allowing the rest to go through the primary oil filter. Why do this? The bypass oil filter filters down to a much smaller micron size, letting the dual-filter assembly accomplish a far superior filtration job over a standard single-filter setup.
Amsoil Oiling System - Fantastic Filtration

 Amsoil's bypass-filter assembly has an incorporated spring-loaded check valve built into it. It basically directs 10-15 percent of the oil flow into the bypass filter, allowing the rest to go through the primary oil filter. Why do this? The bypass oil filter filters down to a much smaller micron size, letting the dual-filter assembly accomplish a far superior filtration job over a standard single-filter setup.  View Related Article

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