Finding the right replacement oil filter can be confusing with so many brands and part numbers. This guide will teach you how to decode filter part numbers and use cross-reference tools effectively.
Understanding Oil Filter Part Numbers
Every oil filter manufacturer uses their own part numbering system. While these numbers may seem random, they often contain useful information about the filter's specifications and applications.
Common Part Number Formats
- Baldwin: Uses prefixes like B (bypass), BT (spin-on), PA (air), PF (fuel). Example: BT259 is a spin-on oil filter.
- Wix: Typically 4-5 digit numbers. Example: 51515 is a common automotive oil filter.
- NAPA Gold: Usually 4 digits. Example: 1515 (equivalent to Wix 51515).
- FRAM: Uses prefix PH (oil), CA (air), G (fuel). Example: PH3614 is an oil filter.
- Fleetguard: Uses LF (lube filter), FF (fuel filter), AF (air filter). Example: LF3000.
💡 Pro Tip
The easiest way to find a cross-reference is to use our free filter lookup tool. Simply enter any part number and instantly see equivalents from all major brands.
How to Cross-Reference Oil Filters
Cross-referencing allows you to find equivalent filters from different manufacturers. Here's a step-by-step process:
- Identify Your Current Filter: Check the part number on your existing filter or look up the original equipment (OE) number in your vehicle's manual.
- Use a Cross-Reference Tool: Enter the part number in FilterXRef to find equivalent filters from Baldwin, Wix, NAPA, FRAM, Donaldson, Fleetguard, and more.
- Verify Specifications: Always confirm that the replacement filter matches key specs like thread size, gasket diameter, height, and micron rating.
- Check Availability: Once you have equivalent part numbers, check local parts stores or online retailers for the best price and availability.
Major Oil Filter Brands Compared
Here's an overview of the major oil filter brands and their typical applications:
| Brand | Best For | Part Number Prefix |
|---|---|---|
| Baldwin | Heavy-duty, industrial | B, BT, BF, PA |
| Wix | Automotive, fleet | 5xxxx (5 digits) |
| NAPA Gold | Automotive (retail) | 4 digits |
| FRAM | Consumer automotive | PH, CA, G |
| Fleetguard | Cummins engines, HD | LF, FF, AF |
| Donaldson | Industrial, agriculture | P55xxxx |
Popular Cross-Reference Examples
Here are some of the most commonly searched oil filter cross-references:
Wix 51515 Equivalents
- NAPA Gold: 1515
- FRAM: PH3614
- Baldwin: B1402
- Purolator: L10241
Baldwin BT259 Equivalents
- Fleetguard: LF3000
- Donaldson: P550008
- Wix: 51806
- NAPA Gold: 1806
Tips for Choosing the Right Filter
- OE Quality vs. Premium: Most aftermarket filters meet OE specifications. Premium filters may offer extended drain intervals or synthetic media.
- Check Thread Size: Using the wrong thread size can cause oil leaks or damage the filter housing. Always verify compatibility.
- Consider Your Application: Heavy-duty and fleet applications may benefit from extended-life filters like Fleetguard or Donaldson.
- Buy from Authorized Dealers: Counterfeit filters are a real problem. Buy from authorized dealers or reputable online retailers.
🔍 Start Your Search
Ready to find the right replacement filter? Use our free cross-reference tool with over 1 million filter records from Baldwin, Wix, Mann, Fleetguard, and Donaldson.
Search Filters NowConclusion
Understanding oil filter part numbers and cross-references saves time and money. Whether you're a fleet manager, mechanic, or DIY enthusiast, knowing how to find equivalent filters ensures you always get the right part at the best price.
Bookmark FilterXRef.com for instant access to our comprehensive cross-reference database whenever you need to find a replacement filter.