Wix Oil Filters Cross Reference: How to Find Compatible Replacements
When you're shopping for an oil filter and the exact part number isn't available, a cross reference is how you find a compatible substitute. For Wix filters specifically, cross referencing lets you match a Wix filter number to equivalent filters from other brands — or find which Wix filter replaces a competitor's part number.
Understanding how this works, and where it can go sideways, saves time and protects your engine.
What an Oil Filter Cross Reference Actually Does
An oil filter cross reference is a lookup that maps one manufacturer's part number to equivalent part numbers from other brands. The idea is that filters with matching thread size, gasket diameter, bypass valve pressure, and anti-drainback valve design can often be used interchangeably.
Wix is one of the most widely used filter brands in the aftermarket, and many other brands — including NAPA Gold (which shares manufacturing origins with Wix), Purolator, Fram, Bosch, Mobil 1, and AC Delco — are commonly cross-referenced against Wix numbers.
The cross reference doesn't just tell you "these two filters look similar." It signals that both filters were engineered to meet the same application requirements for a specific engine family.
How Wix Cross Reference Lookups Work
Wix publishes its own cross reference database, and third-party filter lookup tools also maintain large cross reference tables. The two most common ways to use them:
Starting with a Wix number: You have a Wix part number (such as a WIX 51060 or similar) and want to know which Fram, Mobil 1, or OEM-equivalent filter matches it.
Starting with a competitor's number: You have a Fram PH8A, for example, and want to find the corresponding Wix filter.
Either direction works, and most lookup tools support both.
Where to Run a Wix Cross Reference
- Wix Filters' official website (wixfilters.com) has a built-in part number lookup and cross reference tool
- NAPA's parts lookup — since NAPA Gold filters are made by Wix, their numbers are closely aligned
- Third-party tools like RockAuto, Advance Auto Parts, and AutoZone all support cross-reference lookups by make, model, year, and engine size
- Printed filter catalogs, still used in many independent shops, also include cross reference charts
Key Specs That Must Match — Not Just the Part Number 🔧
A cross reference match is a starting point, not a guarantee of perfect interchangeability for every use case. The specs that actually matter:
| Spec | Why It Matters |
|---|---|
| Thread size and pitch | Filter must physically attach to the engine block |
| Gasket/seal diameter | Proper seating prevents leaks |
| Bypass valve pressure rating | Controls when unfiltered oil bypasses the filter media |
| Anti-drainback valve | Prevents dry starts; not all filters include one |
| Filter media type | Synthetic vs. cellulose affects filtration efficiency and capacity |
| Overall length and diameter | Clearance issues can arise in tight engine bays |
Two filters can share the same thread size but differ in bypass valve pressure rating — which matters more in high-performance engines or turbocharged applications. A cross reference tool assumes standard operating conditions. If your vehicle has unusual requirements (severe duty, extended drain intervals, forced induction), the spec sheet matters more than the lookup result.
Wix and NAPA Gold: The Same Filter, Different Labels
One point worth knowing: NAPA Gold filters are manufactured by Wix. This means a NAPA Gold 1515 and its corresponding Wix filter are physically the same part — same media, same valve specs, same construction. The label and distributor differ, but the filter doesn't.
This is useful information when one is on sale, or when one is locally available and the other isn't. The cross reference between these two brands is unusually reliable compared to cross references between brands with different manufacturing sources.
Where Cross References Can Mislead You
Cross reference databases are updated periodically, but they're not always current. A few situations where you should double-check:
- Recent model-year vehicles — new engines sometimes require unique filter specs that haven't been fully cataloged yet
- Diesel engines — tend to have higher oil pressures and specific bypass valve requirements; not all gasoline filter cross references translate cleanly
- European vehicles — filter thread sizes and dimensions often differ from domestic applications
- High-mileage or modified engines — may benefit from specific media types or higher-capacity filters that a generic cross reference won't reflect
If the cross reference match looks right but the physical filter dimensions seem off compared to what's currently on your engine, that's a signal to verify with a second source before installing.
The Variables That Shape Your Specific Result
The "right" Wix cross reference for any given vehicle depends on:
- Engine size and type (gas, diesel, turbocharged, naturally aspirated)
- Oil change interval (standard vs. extended drain)
- Driving conditions (highway, city, towing, off-road, track use)
- Model year — the same engine family can have revised filter specs across generations
- Whether you're using conventional, synthetic blend, or full synthetic oil — filter media compatibility matters more with extended synthetic intervals
A Wix 51060 that's correct for one 5.7L V8 might not be the right cross reference match for a different 5.7L application from another manufacturer, even though the thread dimensions look identical.
The cross reference tool gives you a strong starting point. What it can't account for is how your specific engine, your oil type, your drain interval, and your driving conditions interact — that's where your owner's manual and a parts professional who knows your vehicle fill in the gaps.
