WIX 51045 vs Donaldson P550505: Oil Filter Compatibility
Compare WIX 51045 and Donaldson P550505 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 13/16-16 thread.
Quick verdict
Both use a 13/16-16 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 51045 and Donaldson P550505 specifications
How matching is scored| Specification | WIX 51045 | Donaldson P550505 |
|---|---|---|
| Thread size | 13/16-16 | 13/16-16 |
| Gasket OD | 69.44 mm | 70 mm |
| Gasket ID | 61.72 mm | 60 mm |
| Can OD | 74.19 mm | 75 mm |
| Height | 122.6 mm | 113 mm |
| Internal bypass valve | No | No |
| Bypass PSID | Not applicable | Not applicable |
| Anti-drainback valve | No | No |
What matters in this specific comparison
Thread size matches: both are 13/16-16.
Gasket OD differs by 0.6 mm (WIX 51045: 69.44 mm, Donaldson P550505: 70 mm).
Gasket ID differs by 1.7 mm (WIX 51045: 61.72 mm, Donaldson P550505: 60 mm).
WIX 51045 is 9.6 mm taller (WIX 51045: 122.6 mm, Donaldson P550505: 113 mm) -- check clearance before substituting.
Can OD differs by 0.8 mm (WIX 51045: 74.19 mm, Donaldson P550505: 75 mm).
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.