AMSOIL Oil Filter Cross Reference: Chart, Equivalents & Buying Guide

AMSOIL is widely known for its high‑performance synthetic oils, but the company also offers a premium line of oil filters designed for extended service intervals and high efficiency. If you’re looking for AMSOIL filter equivalents or want to cross‑reference part numbers to other brands such as FRAM, WIX, Mobil 1, Bosch, or Purolator, this guide will help. Here you’ll find a cross‑reference chart, technical details, and a step‑by‑step buying guide to ensure you get the right filter for your application.

Quick Cross‑Reference Chart (Popular AMSOIL EaO Filters)

How to use this chart: Match your AMSOIL EaO filter part number to common equivalents from other brands. Always verify fitment by checking thread size, gasket OD, height, and bypass settings.

* Applications are generalized. Always confirm by vehicle year/engine.
** Equivalents are catalog‑supported interchanges. Verify bypass and dimensions before extended use.

Why AMSOIL Filters Stand Out

AMSOIL EaO (now often branded as EA15K series) filters are designed for drivers who use synthetic oil and want extended change intervals without sacrificing protection. Key features include:

• Synthetic Nanofiber Media: Captures 98.7% of contaminants down to 20 microns (per ISO 4548‑12).
• Extended Drain Capability: Rated for 15,000 miles or OEM interval (whichever is longer) when paired with AMSOIL synthetic oil.
• Silicone ADBV: High‑temperature resistant, maintains flexibility in cold conditions.
• Heavy‑Duty Construction: Thicker can, crimped base plate, metal end caps.
• Durable Bypass Valves: Precisely matched to OEM requirements.

AMSOIL Filter Product Lines

• EaO / EA15K Series: Spin‑on filters designed for extended drains, premium synthetic media.
• Ea15K Cartridge Filters: Designed for modern cartridge housings with synthetic elements.
• Heavy‑Duty EaOHD: Larger filters for diesel trucks, agricultural equipment, and heavy machinery.

Understanding Cross‑References

Cross‑referencing ensures you can find an alternate brand filter with the same mounting geometry and similar performance. However, not all equivalents are created equal:

• Efficiency: AMSOIL filters are often more efficient than economy filters in other brands.
• Longevity: Standard filters (like FRAM Extra Guard or WIX Classic) may not match AMSOIL’s 15,000‑mile rating.
• Bypass PSI: Always confirm—some engines are sensitive to bypass valve differences.
• Media Type: Synthetic (AMSOIL, Mobil 1, WIX XP) vs cellulose (basic FRAM, Purolator).

Checklist to Confirm a Safe Equivalent

1. Thread Size & Pitch: Ensure exact match (M20×1.5, 3/4‑16, etc.).
2. Gasket OD & Seating: Verify that gasket fully lands on sealing pad.
3. Can Height & Diameter: Long vs short filters may be interchangeable if clearance allows.
4. Bypass Valve PSI: Match the OEM/AMSOIL spec to prevent oil starvation.
5. ADBV Material: Choose silicone for modern engines, synthetic oil, and long intervals.

AMSOIL Families & Their Equivalents

M20 × 1.5 Thread, Gasket OD ~2.48” (Asian Engines)

• EaO17 / EA15K17
  Equivalents: FRAM PH7317/PH6607, WIX 51356, Purolator L14622, Mobil 1 M1‑110, Bosch 3323

3/4‑16 Thread, Gasket OD ~2.73” (Ford/Chrysler)

• EaO13 / EA15K13
  Equivalents: FRAM PH8A, WIX 51515, Purolator L30001, Bosch 3500, Mobil 1 M1‑301

13/16‑16 Thread, Gasket OD ~2.73” (GM Legacy)

• EaO34 / EA15K34
  Equivalents: FRAM PH30, WIX 51060, Purolator L30005, Bosch 3500

Modular Ford V8 Family

• EaO42 / EA15K42
  Equivalents: FRAM PH2, WIX 51372, Purolator L24651, Bosch 3422, Mobil 1 M1‑210

Cartridge Filters (GM Ecotec, Hyundai/Kia, etc.)

• EaO57 / EA15K57 (GM Ecotec 2.2/2.4L)
  Equivalents: FRAM CH9018, WIX 57060XP, Purolator C25869

AMSOIL vs Other Brands

• AMSOIL vs FRAM: FRAM Ultra Synthetic (XG series) is the closest match, with extended service life. FRAM Extra Guard is not equivalent to AMSOIL’s durability.
• AMSOIL vs WIX: WIX XP line is the most comparable, using full synthetic media. Standard WIX filters are a step down in longevity.
• AMSOIL vs Mobil 1: Mobil 1 Extended Performance filters are almost identical in service life and efficiency to AMSOIL.
• AMSOIL vs Bosch: Bosch Distance Plus line is their extended‑life option, comparable to AMSOIL EA15K.
• AMSOIL vs Purolator: Purolator BOSS (PBL) line is comparable. PurolatorONE is a mid‑tier option below AMSOIL in longevity.

Extended Service Guidance

• AMSOIL + AMSOIL Oil: Up to 15,000 miles or longer (per vehicle OLM).
• AMSOIL Filter + Synthetic Oil (Other Brands): Safe for extended intervals if oil and driving conditions allow.
• Standard Oil & AMSOIL Filter: You can still use an AMSOIL filter with conventional oil, but change at OEM oil interval.
• Heavy Duty/Towing: Reduce interval by 25–40% for severe service.

Shop & Fleet Tips

• Stock both short and long can sizes in common thread families (M20×1.5 and 3/4‑16).
• Label bins with thread + gasket size for easier matching.
• Use AMSOIL EaO filters for synthetic fleets running long OCI (oil change intervals).
• For budget fleets, keep AMSOIL on high‑demand vehicles and use mid‑tier equivalents on others.

Troubleshooting

• Rattle on Startup: Check ADBV quality—ensure silicone valve. If not, consider AMSOIL, Mobil 1, or WIX XP equivalent.
• Oil Pressure Drop: May indicate bypass mismatch—double check spec.
• Gasket Leak: Remove double gaskets; torque 3/4 turn after contact.

FAQs

Q1: Can I run an AMSOIL filter with regular oil?
A: Yes, but follow OEM oil intervals. The filter will outlast the oil.

Q2: Is AMSOIL better than Mobil 1 filters?
A: They are very comparable. Mobil 1 Extended Performance matches AMSOIL closely. Choice often comes down to availability.

Q3: Can I go 25,000 miles on an AMSOIL filter?
A: Not recommended unless AMSOIL specifically certifies it for your engine. Most are rated at 15,000 miles or OEM OLM.

Q4: Do AMSOIL filters void warranty?
A: No, using AMSOIL (or any aftermarket filter meeting OEM specs) does not void warranty.

Q5: What’s the difference between EaO and EA15K labeling?
A: AMSOIL rebranded the EaO line as EA15K, highlighting the 15,000‑mile rating.

How to Build Your Own Cross‑Reference

1. Get your AMSOIL part number.
2. Cross‑check in at least two other catalogs (WIX, Purolator, FRAM, etc.).
3. Confirm dimensions: thread, gasket OD, and height.
4. Verify bypass setting matches OEM spec.
5. Match oil and service interval (conventional, synthetic, severe duty).
6. Document your cross‑reference for future use.

Final Word

AMSOIL EaO (EA15K) filters are premium oil filters built for synthetic oils and long service intervals. While equivalents exist—FRAM Ultra, WIX XP, Mobil 1 EP, Bosch Distance Plus, Purolator BOSS—AMSOIL is among the top choices for protection and longevity. Use the chart in this guide for quick cross‑reference, but always verify with dimensions and bypass specs before installation. If you’re running synthetic oil and want maximum engine life, AMSOIL EaO filters (or equivalent extended‑life filters) are a safe bet.

David Holtzman

I’m David man behind Lawn Mowerly; I’ve been dealing with lawnmowers and Tractors with my father since I was a kid. I know every make and model and what each one is capable of and love helping people find the perfect equipment for their needs.