Amsoil Motor Oil - First In Synthetics and Leading The Industry Since 1972

AMSOIL Spin-On-By-Pass Oil Filter

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 engine’s 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, alter tolerances, fatigue components, and generate 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 a blowby combustion product of fuel ignition or as condensed moisture from air drawn into the engine through the carburetor. 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 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 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 discs, 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 less than one 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. Each filter consists of a mounting unit with a spin-on filtering cartridge, connected by hoses to engine ports as illustrated. The entire assembly is less bulky than other bypass systems, and fits easily into cramped engine compartments. Changing the spin-on filter is simple . . . no more soggy, dripping elements sliding out of tilted cannisters!

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