To find the exact AMSOIL oil filter match for your heavy-duty equipment, you must cross-reference your current filter’s part number or equipment model, and then verify critical physical specs—specifically the thread size, gasket diameter, and bypass valve pressure rating. While AMSOIL’s industry-leading 99% efficiency filters offer premium protection, even a tiny mismatch in these dimensions can quietly starve your engine of oil or let damaging wear particles slip through. Here is your ultimate AMSOIL oil filter cross-reference guide for you.
What Are AMSOIL Oil Filters?
AMSOIL oil filters boast an industry-leading filtering efficiency of 99% at 20 microns while improving oil flow through the filter. This has made AMSOIL Oil Filters one of the best on the market. These oil filters can trap and hold more small wear particles, which can cause contamination compared to other filters. According to the newest testing, AMSOIL EA oil filters have now shown an increase in filtering efficiency from 98.7% to 99% or higher using the ISO 4548-12 industry standard.
AMSOIL EA motorcycle oil filters provide superior protection for a wide variety of applications. These applications include: motorcycles, ATVs, UTVs, four-stroke personal watercraft, four-stroke snowmobiles and four-stroke outboards. The 99% efficiency at 20 microns applies to these filters as well. Also, they make filters that fit small engine equipment with the same superior construction and synthetic filter media, which provides 99% efficiency for the recommended OEM drain intervals.
When it comes to heavy-duty equipment, AMSOIL’s EAHD product line uses the same technology in making their filters. This product line is for vehicles like farm tractors, trucks and school buses. They fit models from common engine manufacturers like Caterpillar, John Deere, Ford, Peterbilt, Mack, Kenworth and more.
AMSOIL Oil Filter Cross Reference Chart
In this part, we’ll list popular AMSOIL oil filters and their compatible equivalents from other reputed brands for your reference.
| AMSOIL Part Number | Common Equivalents |
|---|---|
| ASF20 | Baldwin B1401, AC-Delco AC045 |
| ASF36 | Baldwin B1421, AC-Delco PF1127 |
| EAO11 | WIX 51358, Mann W712/51 |
| EAO15 | FRAM PH10060, Luber-Finer PH10064, Purolator L14641 |
| EAOM | Mann W712/51, K&N KN-303 |
| HD Series (Heavy Duty) | WIX 57120, Donaldson P550388, Baldwin B7299 |
See Related Cross Reference Chart:
Fram Oil Filter Cross Reference
WIX Oil Filter Cross Reference
How to Choose AMSOIL Oil Filters?
Selecting the right oil filter is essential for the filtration efficiency and optimal performance of your vehicle. So, you must check an oil filter by hand to confirm the match before cross-referencing. Here are four specific things to watch:
- Thread Size and Pitch: The mounting thread has to match exactly, or the filter won’t seal. This is the one most cross-reference tools get right, since a mismatch here is immediately obvious.
- Gasket Outer Diameter: Too large or small and the gasket won’t seat correctly against the mounting surface, risking an external oil leak that may not show up until the engine’s already run for a while.
- Gasket Height/Filter Length: On some engines, a filter that’s too long can contact internal components; too short can leave inadequate sealing surface contact.
- Bypass Valve Pressure Setting: This is the least visible and most commonly overlooked factor. If the filter media clogs or oil is cold and thick, the bypass valve opens to let oil flow around the filter rather than starve the engine. If a cross-referenced filter’s bypass opens at a different pressure than the engine was designed around, it can either bypass too early (reducing filtration) or too late (risking oil starvation under cold start).
A part number that “crosses” on a chart has typically been verified against the first two or three of these by whoever built the chart. Bypass pressure is the one worth actually confirming yourself, or through AMSOIL’s official tool, before trusting an unfamiliar cross-reference.
AMSOIL Oil Filter Lines
You can see which family the AMSOIL filter belongs to by glancing at the prefix.
| Prefix | What it is | Typical use |
|---|---|---|
| EA15K | Automotive full-flow oil filters (formerly EaO) | Cars, light trucks, SUVs; rated for 15,000-mile service |
| EAOM | Motorcycle and powersports oil filters | Harley-Davidson, metric bikes, ATVs, UTVs |
| EABP (EABP90, EABP100, EABP110) | Bypass oil filters, used alongside the full-flow filter | Diesels and equipment wanting finer filtration; needs a bypass mounting kit |
| EAHD | HD Series | Farm tractors, trucks and commercial equipment |
| EA air filters | Engine air filters | Cars, trucks and powersports; see the AMSOIL air filter guide |
Frequently Asked Questions
What happened to AMSOIL’s EaO filter line?
EaO line was not discontinued. It was simply a name change from EaO to EA15K. They are made on the same production line, with the new name directly reflecting their 15,000-mile service life.
Is AMSOIL better than Valvoline?
AMSOIL filters and oils are designed for extended protection and longer service intervals compared to standard conventional or synthetic oils like Valvoline. While Valvoline performs well in general applications, AMSOIL is often praised for heavy-duty, high-performance, or extended-interval service.
Can I mix Mobil 1 with AMSOIL?
Yes, AMSOIL and Mobil 1 oils are chemically compatible and can be mixed in emergencies. However, mixing these two oils may reduce the benefits of extended service intervals and specific additive packages unique to each. We recommend sticking with a single brand and oil type for optimal performance of your vehicles.
Conclusion
The AMSOIL oil filter cross-reference tool can help you find the compatible oil filter from other brands for less. When it comes to selecting the right oil filters, you must confirm the replacement part number and several other factors like thread size, pitch, gasket outer diameter and filter length as well. At FridayParts, we are dedicated to providing a vast selection of quality oil filters for your on- and off-road vehicles. Our extensive oil filter catalog includes compatible equivalents to Caterpillar, Kubota, John Deere, Peterbilt, Mack and more. Explore now and enjoy reliable filtration efficiency!
