Donaldson P550422 vs WIX 51726: Oil Filter Compatibility
Compare Donaldson P550422 and WIX 51726 oil filters by compatibility, dimensions, thread size, gasket fit, bypass valve, anti-drainback valve status, and match confidence. Use this comparison as a fitment review, not as an automatic substitution guarantee. Both use a M20x1.5 thread.
Quick verdict
Candidate adds internal bypass; usually redundant with engine-mounted bypass · Candidate adds ADBV
- Thread size is the first hard-fit check for any comparison of spin-on filters.
- Gasket OD and gasket ID are the most important seal-related dimensions.
- Height differences can matter for clearance even when thread and gasket fit appear close.
- Bypass and anti-drainback differences may be important, depending on the application.
Donaldson P550422 and WIX 51726 specifications
How matching is scored| Specification | Donaldson P550422 | WIX 51726 |
|---|---|---|
| Thread size | M20x1.5 | M20x1.5 |
| Gasket OD | 100 mm | 98.17 mm |
| Gasket ID | 88 mm | 87.63 mm |
| Can OD | 102 mm | 106 mm |
| Height | 150 mm | 152 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Not applicable | 12 - 15 |
| Anti-drainback valve | No | Yes |
What matters in this specific comparison
Thread size matches: both are M20x1.5.
Gasket OD differs by 1.8 mm (Donaldson P550422: 100 mm, WIX 51726: 98.17 mm).
Gasket ID differs by 0.4 mm (Donaldson P550422: 88 mm, WIX 51726: 87.63 mm).
WIX 51726 is 2 mm taller (Donaldson P550422: 150 mm, WIX 51726: 152 mm) -- check clearance before substituting.
Can OD differs by 4 mm (Donaldson P550422: 102 mm, WIX 51726: 106 mm).
Bypass valve presence differs: WIX 51726 has one, Donaldson P550422 does not.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.