Fram Filter Cross Reference: How to Find Compatible Oil Filters Across Brands

When your usual oil filter isn't on the shelf — or you're wondering whether a different brand fits your engine — a filter cross reference is the tool that tells you which filters from other manufacturers are interchangeable with a specific part number. Fram publishes cross reference data for exactly this reason, and so do most other filter brands.

Here's how the system works, what the numbers mean, and what to watch for when swapping between filter brands.

What a Filter Cross Reference Actually Does

A cross reference chart maps one manufacturer's part number to equivalent part numbers from competing brands. If you know your Fram filter number — say, a PH3600 — a cross reference tells you which Wix, Purolator, Bosch, Motorcraft, ACDelco, K&N, and other filters share the same thread size, bypass valve setting, filter media dimensions, and anti-drainback valve design.

The reverse works too. If a parts store is stocked with Wix but not Fram, you can look up the Wix number that corresponds to your usual Fram filter.

Cross references don't guarantee identical performance — more on that below — but they confirm physical and functional compatibility based on published manufacturer data.

How Fram Organizes Its Filter Lineup

Fram produces several distinct filter series, and the cross reference you need depends on which type of filter you're looking up:

Each series has its own part numbering system. A cross reference for a PH3600 (oil filter) won't pull results for cabin or air filters — those use separate lookup systems.

Where to Find Fram Cross Reference Data 🔍

Fram maintains a vehicle lookup tool at its official website where you enter your year, make, model, and engine size to find the correct filter number. From there, the site also shows compatible alternatives.

Third-party cross reference databases are widely used and often more convenient:

• Wix Filters cross reference tool — one of the most comprehensive in the industry
• Rockauto.com — lists multiple brands side by side for a given application
• NAPA, O'Reilly, and AutoZone lookup systems — match by vehicle or by competitor part number
• Filtros and Filterseek — independent filter cross reference aggregators

When using any of these, always verify the result against the vehicle application lookup, not just the part number match alone. A filter may share a thread size with another but differ in height, bypass pressure, or media type.

What the Part Numbers Tell You — and What They Don't

Matching part numbers across brands confirms that filters share the same mounting thread, gasket diameter, overall dimensions, and bypass valve pressure range as tested by the manufacturer. That's enough to confirm the filter will physically fit and function correctly in normal operation.

What part number matching doesn't tell you:

• Filter media quality — synthetic, cellulose, or blended media vary in efficiency and particle capture ratings, even among filters that physically interchange
• Capacity and collapse strength — relevant in high-performance or extended-interval applications
• Anti-drainback valve material — silicone valves hold up better in cold climates than nitrile
• Bypass valve pressure setting — usually consistent across interchangeable filters, but worth confirming in performance applications

For most everyday oil changes on standard passenger vehicles, these differences are minor. For high-performance engines, turbocharged applications, or extended drain intervals, they're worth researching.

Variables That Shape Which Cross Reference You Need

The right cross reference result depends on more than just brand preference:

Engine type — A 2.0L four-cylinder and a 5.7L V8 in vehicles made by the same manufacturer often use completely different filters. Displacement, oil pressure, and flow rate all factor into filter selection.

Oil change interval — If you're running synthetic oil on a 10,000-mile interval, you'd cross reference within Fram's Ultra Synthetic (XG) line rather than the standard Extra Guard. A Wix filter rated for standard intervals isn't a straight substitute in that context, even if the part numbers cross.

Vehicle age and condition — Older engines with higher clearances sometimes run slightly different viscosity oil, and filter bypass pressure can matter more in those applications.

Climate — Cold-start performance depends partly on anti-drainback valve material. Drivers in colder climates sometimes specifically seek out silicone-valve filters.

Turbocharged engines — These put greater demands on filtration at startup. Some owners specifically avoid lower-tier filters regardless of what the cross reference shows as equivalent.

When Cross References Diverge ⚠️

Occasionally, two sources show different cross reference matches for the same Fram number. This usually happens because:

• One source is using outdated data
• The filter was updated mid-production run and the old and new versions have slightly different dimensions
• One brand's cross reference is based on a "fits the application" standard while another uses strict dimensional matching

When results conflict, go back to the vehicle application lookup rather than relying solely on part number cross referencing. Matching the filter to your specific engine — rather than just to another part number — is the more reliable path.

The Piece Only You Can Supply

Cross reference tools give you the compatibility map. What they can't account for is your specific engine's condition, your oil change habits, the climate you drive in, whether you're running extended synthetic intervals, and what's actually available at the parts store in front of you.

Those are the variables that determine whether the cross reference result is the right choice for your vehicle — not just a compatible one.