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AMSOIL Oil Filters
AMSOIL Oil Filters feature advanced full-synthetic media that traps and holds a greater amount of small, wear-causing contaminants compared to conventional and other high-efficiency filters.
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| Product code | Package size | Unit of measure |
|---|---|---|
| EAO99-EA | Each | Each |
| EAO99-CA | Case of 6 | Case of 6 |
The AMSOIL Oil Filter is the company's full-synthetic media spin-on oil filter for cars, light trucks, SUVs, and vans, sold under the EaO and Ea15K product lines. The line covers most popular passenger-car and light-truck applications with codes EAO11 through EAO99 and EA15K01 through EA15K88, all built with resin-free synthetic media that delivers 99 percent filtering efficiency at 20 microns based on industry-standard ISO 4548-12 testing.
The AMSOIL Oil Filter uses a full-synthetic media that is resin-free, so it resists degradation from hot oil over a long drain interval. The media is pleated against a rigid wire-mesh backing for strength, which keeps the pleats from collapsing under cold-start pressure spikes or during high-flow operation. The result is a filter that holds more contaminants per square inch of media than a comparable cellulose filter, with lower flow restriction at the same operating temperature.
Filtering efficiency is the share of contaminants of a given size that the filter captures on a single pass. The AMSOIL Oil Filter is rated at 99 percent efficient at 20 microns under ISO 4548-12, which is one of the higher ratings in the passenger-car oil filter category. Some competing filters claim 99 percent efficiency only at 30 to 40 microns, a much larger particle size that allows more wear-causing material through to engine bearings and cam surfaces.
Each AMSOIL Oil Filter has a textured easy-grip coating on the housing that simplifies installation and removal in tight engine bays where a filter wrench will not fit. Most filters in the line also have a reference arrow on the housing. Once the filter is hand-tight against the engine, the arrow makes it easy to gauge the additional 0.75 to 1.25 turns recommended to seat the gasket without overtightening, which is a common cause of leaks and stuck filters at the next service.
When the filter is paired with an AMSOIL synthetic motor oil, the EaO codes (EAO11 through EAO99) are rated for up to 25,000 miles or one year in normal service and 15,000 miles or one year in severe service, whichever comes first. The Ea15K codes (EA15K01 through EA15K88) are rated for up to 15,000 miles or one year, whichever comes first. The filter should be changed at every oil change, and when paired with a non-AMSOIL motor oil, replacement should follow the vehicle manufacturer's recommendation.
The AMSOIL Oil Filter is the standard passenger-car oil filter in the AMSOIL lineup, covering most domestic and import gasoline and light-duty diesel applications. The exact code depends on the year, make, model, and engine. The AMSOIL Vehicle Lookup Guide is the fastest way to find the right code, and the oil filter guide compares the EaO and Ea15K lines against the rest of the AMSOIL filter catalog.
Most owners pair the AMSOIL Oil Filter with an AMSOIL Signature Series, XL, or OE synthetic motor oil so that the filter and oil drain intervals line up under the same warranty program. The AMSOIL Vehicle Lookup Guide shows the matching oil for each filter code.
| Property | Value |
|---|---|
| Style | Spin-on |
| Media | Full-synthetic, resin-free, pleated on wire-mesh backing |
| Filtering efficiency (ISO 4548-12) | 99 percent at 20 microns |
| Housing finish | Easy-grip textured coating |
| Installation reference | Reference arrow on housing (most codes); 0.75 to 1.25 turns past hand-tight |
| Service life, EaO codes (with AMSOIL synthetic motor oil) | Up to 25,000 miles or 1 year normal; 15,000 miles or 1 year severe |
| Service life, Ea15K codes (with AMSOIL synthetic motor oil) | Up to 15,000 miles or 1 year |
| Service life with non-AMSOIL motor oil | Per vehicle manufacturer's recommendation |
| Filter wrenches available | GA255 (65 to 67 mm), GA251 (76 mm), GA252 (93 mm) |
The AMSOIL Oil Filter is sold as individual EaO and Ea15K codes covering most passenger-car and light-truck applications. AMSOIL filters are backed by the AMSOIL Limited Liability Warranty, and using AMSOIL synthetic lubricants and filters does not void a new vehicle manufacturer warranty. Match the right code for the vehicle with the AMSOIL Vehicle Lookup Guide, compare against other AMSOIL choices in the oil filter guide, then order the AMSOIL 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.
The EaO codes are rated for up to 25,000 miles or one year in normal service when paired with an AMSOIL synthetic motor oil. The Ea15K codes are rated for up to 15,000 miles or one year. Both lines use the same full-synthetic media and the same 99 percent at 20 microns ISO 4548-12 efficiency rating; the difference is service-life rating, not filter quality.
No. Using AMSOIL synthetic lubricants and AMSOIL filters does not void a new vehicle manufacturer warranty. The Magnuson-Moss Warranty Act prevents an OEM from voiding a warranty solely for using a non-OE part as long as the part meets the OE specification. AMSOIL filters meet or exceed OE-grade efficiency, and they are backed by the AMSOIL Limited Liability Warranty separately.
The reference arrow on the housing is meant to be lined up with a fixed point on the engine when the filter is hand-tight against the gasket, then turned an additional 0.75 to 1.25 turns to seat the gasket. Overtightening past that range distorts the gasket and can cause leaks or a stuck filter at the next change.
AMSOIL offers three filter wrench sizes with a 3/8-inch square drive: GA255 covers 65 to 67 mm filters (including EA15K09, EA15K12, EA15K13), GA251 covers 76 mm filters (including EAO17, EAO23, EAO34, EAO55, EAO64), and GA252 covers 93 mm filters (including EAO11, EAO15, EAO24, EAO26, EAO27, EAO42, EAO52, EAO80, EAO98). The wrenches use a standard ratchet and reach into engine bays where a band-style wrench will not fit.
Yes. The AMSOIL Oil Filter should be replaced at every oil change, even when the drain interval is shorter than the filter's full service-life rating. Reusing a filter shortens the effective drain interval of the next oil fill and reduces the protection it can deliver between services.
Yes, and the filter still delivers 99 percent at 20 microns. When the AMSOIL Oil Filter is used with a non-AMSOIL motor oil, the filter should be changed according to the vehicle manufacturer's recommendation rather than the AMSOIL extended-drain rating, since the extended-drain rating depends on the AMSOIL synthetic motor oil it is paired with.