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THE AMSOIL
SPIN-ON BY-PASS OIL FILTER
- Absolute Protection from Engine Dirt
- Assurance of Analytically Clean Oil
WHY ANOTHER FILTER?
Even the best full flow-filter can't do it all.
Any full flow filter must allow
oil to pass through it quickly to keep the engine from starving
for oil. Advances in auto technology and more compact
engine designs place increasing demands on these filters;
to keep from creating a circulation bottleneck they filter
out only the coarser particles, and feature relief valves
that open when the engines demand for lubrication can't
be ignored.
But the smallest grit that
passes through- road dust, manufacturing scarf,
and engine metal-flake in the 5- to 20-micron range - accounts
for up to 60% of all engine wear. These microscopic
particles closely match the precision clearances between
critical engine components; they can enter the spaces between
bearings, rings, and other components, to damage metal surfaces,
altering tolerances, fatiguing components and generating
additional debris.
Automobile engines are also
susceptible to damage related to water formation, something
a full flow filter is powerless against. Water enters
the oil either as blowby combustion product of fuel ignition,
or as condensed moisture from air drawn into the engine
through the air intake. Water causes metal surfaces
to rust; it also reacts with other blowby contaminants to
produce corrosive acids that attack the engine, contributing
to further friction, wear, debris, and oil degradation.
The AMSOIL Solution-
By-Pass Filtration
Unlike a full-flow filter,
the AMSOIL By-Pass Filter is situated outside of
the main line of oil circulation; it taps into the line
to bleed off and clean only a portion of the oil at a time.
The AMSOIL By-Pass Filter retains the oil longer and does
a more thorough job of removing contaminants without obstructing
flow. You still need a full-flow filter, of course,
because oil must circulate continuously. But with an AMSOIL
By-Pass Filter drawing 10% of your system's capacity, all
the oil in a six-quart system will be filtered to analytical
purity in about five minutes, at an average engine
speed equivalent to 45 mph.
The differences between the
AMSOIL By-Pass Filters and others are the unique design
of the filtering media and the patented construction of
the filter element. Our high-capacity filtration medium
is a special blend of virgin wood and cotton fibers formed
into disc, stacked, and compressed. The center tube
is all-steel, perforated for oil flow and wrapped with a
fine mesh cotton screen. All dirt particles down to
one-tenth of a micron in size are trapped, and the
medium's thirsty cellulose fibers can remove up to a pint
of water. Channeling is eliminated with the
inclusion of a hydraulic follower plate activated by a sophisticated
internal pressure system.
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