What brand of oil filters are compatible with the Wix oil filter?

In the fast-paced world of vehicle maintenance, it’s frustrating to find your go-to oil filter out of stock. You want to make a quick, confident replacement—but is there a safe alternative to WIX?

Yes, many brands produce oil filters that are fully compatible with WIX equivalents—if you know how to check cross-reference specifications and prioritize performance.

Sometimes, your supplier is low on WIX filters. Other times, your client insists on a specific brand. That’s when knowing which filters work as reliable substitutes becomes critical. In my experience at Runex Auto, the key is understanding compatibility, performance metrics, and supplier credibility—not just sticking to a name on the box.

Are FRAM and WIX Filters the same?

Sometimes customers ask me if FRAM and WIX are identical—especially when they see comparable part numbers. The short answer is no, but there's more nuance.

FRAM and WIX are different brands with their own manufacturing processes and filter technologies, but in many cases, their oil filters are functionally interchangeable when the specs align.

Performance vs. Branding

I’ve seen shops use Fram’s PH3614 in place of WIX’s 51348 without issues. Why? Because the dimensions, thread size, bypass valve rating¹, and filtration efficiency² are nearly identical. Here's a breakdown:

What matters most is verifying those specs. At Runex Auto, we encourage all clients to use cross-reference guides³, especially when dealing with sensitive engines or commercial fleets. The brand itself isn’t the full story—performance under pressure is.

How do I know if my oil filter is compatible?

I get this question from distributors and procurement leads almost every week. Compatibility is about more than part numbers—it’s about matching key technical specifications.

To ensure oil filter compatibility, always compare thread size, gasket dimensions, bypass valve settings, and micron rating using a manufacturer’s cross-reference system.

Use the Specs, Not Just the Name

Here’s the process I follow and teach our B2B clients:

1. Cross-reference databases

Start with a WIX part number. Use tools from Baldwin, Luber-finer, Donaldson, and even Runex Auto to see compatible models.

2. Validate critical dimensions

Even if the cross-reference says “match,” confirm that the:

• Thread size⁴ matches exactly.
• Height and gasket diameter fit the filter housing.
• Bypass valve PSI aligns with the OEM requirement.

3. Review operational specs

Some filters offer higher capacity or better filtration media. Runex Auto’s oil filters, for example, use multi-layer synthetic blend media⁵ rated down to 20 microns—making them a high-efficiency substitute for many WIX models.

4. Ask your supplier

A good supplier should help you verify compatibility with technical sheets or CAD drawings. At Runex Auto, we often supply comparison spec sheets upon request.

Does the oil filter brand have to match the oil?

This is a common myth, especially among new procurement managers or clients switching lubricant vendors. But let’s get the facts clear.

No, oil filter brands do not need to match the engine oil brand—as long as both meet OEM requirements and performance specifications.

What Really Matters?

Matching brands may look nice on paper, but it's not required. Instead, focus on these key factors:

1. Oil type compatibility⁶

Some oils are synthetic and run hotter or longer. Make sure the filter is designed to handle extended drain intervals or higher viscosity.

2. Micron efficiency⁷

If you’re using a high-detergent or synthetic oil, pair it with a filter that can handle fine particulates. Runex Auto oil filters use multi-layer media that excels at holding more dirt over long periods.

3. Temperature and flow⁸

For colder climates, use filters with silicone anti-drainback valves (like ours at Runex Auto). This ensures smoother oil flow during startup, reducing engine wear.

In short: choose your filter based on engine demands and environmental conditions—not the brand name on the oil bottle.

What company makes WIX oil filters?

Some clients assume WIX is still an independent brand. But in today’s automotive parts landscape, ownership often changes hands.

WIX Filters are currently owned and manufactured by MANN+HUMMEL, a German-based global filtration leader.

The Bigger Picture

MANN+HUMMEL acquired WIX in 2016. Since then, they’ve expanded global manufacturing, especially in Poland, the USA, and China.

Here’s a snapshot of the group’s filtration brands:

At Runex Auto, we’ve worked with clients who want WIX specs without the WIX price tag. That’s why we developed a full line of compatible oil filters using synthetic media¹⁰, durable canister construction, and optional private labeling¹¹. This is ideal for distributors looking to build their own brand without sacrificing quality.

Conclusion

Oil filter¹² compatibility is about precision—not just matching brand logos. While WIX is a well-respected brand, alternatives like FRAM, Baldwin, Fleetguard, and Runex Auto filters offer similar performance when properly matched. The key is using detailed cross-reference tools and understanding filter specs inside and out. At Runex Auto, we help our clients build flexibility into their supply chain by offering high-performance, cost-effective oil filters that meet or exceed WIX standards. Whether you're facing stock shortages or looking to build a custom brand, there are smart, reliable options available.