WIX 57731 vs Donaldson P550934: Oil Filter Compatibility
Compare WIX 57731 and Donaldson P550934 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
Both use a M20x1.5 thread.
- 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.
WIX 57731 and Donaldson P550934 specifications
How matching is scored| Specification | WIX 57731 | Donaldson P550934 |
|---|---|---|
| Thread size | M20x1.5 | M20x1.5 |
| Gasket OD | 73.66 mm | 72 mm |
| Gasket ID | 62.74 mm | 62 mm |
| Can OD | 94.23 mm | 93 mm |
| Height | 142.2 mm | 136 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 8 | 8 - 11 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M20x1.5.
Gasket OD differs by 1.7 mm (WIX 57731: 73.66 mm, Donaldson P550934: 72 mm).
Gasket ID differs by 0.7 mm (WIX 57731: 62.74 mm, Donaldson P550934: 62 mm).
WIX 57731 is 6.2 mm taller (WIX 57731: 142.2 mm, Donaldson P550934: 136 mm) -- check clearance before substituting.
Can OD differs by 1.2 mm (WIX 57731: 94.23 mm, Donaldson P550934: 93 mm).
Both open their bypass valve in a comparable range: WIX 57731 at 8-8 psi, Donaldson P550934 at 8-11 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.