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AMSOIL Oil Filters
Find the right AMSOIL Motorcycle Oil Filter for your bike.
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The AMSOIL Black Oil Filter is the spin-on, full-synthetic media motorcycle oil filter from AMSOIL, supplied in a black housing finish with a fluted body for easy removal. The line carries the EAOM master code, with individual part numbers EAOM103, EAOM109, EAOM134, and EAOM135 covering the most common four-stroke motorcycle, ATV, UTV, snowmobile, marine outboard, and personal watercraft applications, including Honda, Kawasaki, Suzuki, Yamaha, Polaris, Arctic Cat, Aprilia, BMW, Buell, Harley-Davidson, Indian, and Moto Guzzi.
The AMSOIL Motorcycle Oil Filter line uses the same full-synthetic media found in the EaO and EA15K passenger-car AMSOIL Oil Filter platforms. The synthetic fibers capture small, wear-causing contaminants while providing lower flow restriction than typical cellulose media, which matters for cold starts on air-cooled V-twins and for the high-rpm operation common to sport bikes, ATVs, and snowmobiles. The result is steady oil flow to bearings and cam surfaces across the temperature swings powersports engines see.
The Black Oil Filter delivers 99 percent filtering efficiency at 20 microns based on industry-standard ISO 4548-12 testing. Filtering particles greater than 20 microns is the size range most directly tied to engine wear, so high efficiency at that size point translates to better protection for piston skirts, cam lobes, valve-train components, and bearing surfaces over the service life of the lubricant.
Each Black Oil Filter is built with a silicone anti-drainback valve (where applicable by part number) that stays flexible during cold starts, holding oil in the filter so the engine sees pressurized oil quickly when the key is turned. The nitrile sealing gasket resists chemical breakdown for long filter life and consistent sealing across a season of service. The bypass relief valve opens between 11 and 17 psi, which protects against oil starvation during cold-start pressure spikes or if the media reaches its dirt-holding limit ahead of the next oil change.
The Black Oil Filter shares the EAOM line's fluted spin-on body and is finished in a flat-black housing that blends into typical engine cases, the common preference for stock-appearance V-twin owners and most sport-bike, ATV, and snowmobile applications. The chrome variant of the same internal filter is sold separately under the EAOM-C codes for owners who want a chrome housing on a Harley-Davidson or other show-finish bike. The matching AMSOIL filter wrenches with a 3/8-inch square drive simplify removal on tight motorcycle chassis: GA255 (65 to 67 mm) covers EAOM103 and EAOM109, and GA251 (76 mm) covers EAOM134 and EAOM135.
The Black Oil Filter is used on four-stroke motorcycles, ATVs, UTVs, personal watercraft, four-stroke marine outboards, four-stroke snowmobiles, and a number of small-engine power equipment and lawn-tractor applications. The correct part number depends on the engine and chassis. Confirming the right code by year, make, and model with the AMSOIL Vehicle Lookup Guide takes the guesswork out of installation, especially when an owner manual lists multiple acceptable filters or when a Harley-Davidson, Honda, or Yamaha service bulletin updates the recommended filter.
For maximum engine protection, the Black Oil Filter should be replaced at every oil change at the vehicle manufacturer's recommended drain interval. Pairing the filter with an AMSOIL synthetic motorcycle oil from the AMSOIL motorcycle oil guide keeps the lubrication system on a single supplier program, which simplifies warranty conversations on Harley-Davidson, BMW, Honda, Kawasaki, Suzuki, Yamaha, Indian, Moto Guzzi, Buell, Aprilia, and other four-stroke applications.
| Property | Value |
|---|---|
| Style | Spin-on |
| Filtering efficiency (ISO 4548-12) | 99 percent at 20 microns |
| Anti-drainback valve material | Silicone (where applicable) |
| Sealing gasket material | Nitrile |
| Bypass relief valve pressure | 11 to 17 psi |
| Housing finish | Black |
| Body | Fluted for easy removal |
| Heights across the line | 2.47 in. to 3.40 in. (by part number) |
| Diameters across the line | 2.67 in. to 2.97 in. (by part number) |
| Threads across the line | M20 x 1.0, M20 x 1.5, 3/4-16 (by part number) |
The Black Oil Filter is sold under the master code EAOM with individual part numbers EAOM103, EAOM109, EAOM134, and EAOM135. AMSOIL filters are backed by the AMSOIL Limited Liability Warranty, and using AMSOIL synthetic lubricants and filters does not void a new vehicle or equipment manufacturer warranty. Match the right code for the bike, ATV, UTV, snowmobile, or outboard with the AMSOIL Vehicle Lookup Guide, compare the filter against other AMSOIL choices in the oil filter guide, then order the AMSOIL Black Oil Filter.
THE ONLY OIL i WILL USE FOR MY CUMMINS 5.9
Would recommend this to a friend.
Engine actually feels like it runs better and smoother
Would recommend this to a friend.
Using a superior oil filter verse off the shelf filters at the auto parts store is worth. It goes hand in hand with Amsoil.
Would recommend this to a friend.
Both filters share the AMSOIL EAOM Motorcycle Oil Filter design, including the same full-synthetic media, silicone anti-drainback valve, nitrile sealing gasket, and bypass relief valve setting. The only difference is the housing finish: the Black Oil Filter ships in a flat-black housing, and the Chrome Oil Filter ships in a polished chrome housing for show-finish Harley-Davidson and similar applications. Performance is identical between the two.
No. The EAOM Motorcycle Oil Filter line and the EaO and EA15K automotive AMSOIL Oil Filter lines share the same full-synthetic media platform but are sized and threaded for different applications. The EAOM line is the correct choice for four-stroke motorcycle, ATV, UTV, marine, and snowmobile use. The EaO and EA15K codes belong on cars, light trucks, and equipment that calls for an automotive spin-on filter.
The Black Oil Filter codes EAOM134 and EAOM135 cover most Harley-Davidson Big Twin and Sportster applications that take a 3/4-16 thread, 2.97-inch diameter, 3.40-inch tall spin-on filter. EAOM134 includes an anti-drainback valve and EAOM135 does not, matching the mounting orientation Harley-Davidson specifies for each model. Confirming the exact code for a specific model and year through the best oil for Harley-Davidson guide and the AMSOIL Vehicle Lookup Guide is the safest path before ordering.
The Black Oil Filter should be replaced at every oil change, following the vehicle manufacturer's recommended drain interval. Replacing the filter at every oil change protects the lubrication system across the full service interval of the AMSOIL synthetic motorcycle oil it is paired with.
EAOM103 and EAOM109 use a 65 to 67 mm filter wrench (AMSOIL part number GA255). EAOM134 and EAOM135 use a 76 mm filter wrench (AMSOIL part number GA251). Both wrenches feature a 3/8-inch square drive for use with a standard ratchet on tight motorcycle chassis where a band-style wrench will not fit.
No. Using AMSOIL synthetic lubricants and AMSOIL filters does not void a new vehicle or equipment manufacturer warranty. AMSOIL filters are also backed by the AMSOIL Limited Liability Warranty separately from the vehicle warranty.