Donaldson P550909 vs WIX 51459: Oil Filter Compatibility
Compare Donaldson P550909 and WIX 51459 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 3/4-16 thread.
Quick verdict
Both use a 3/4-16 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.
Donaldson P550909 and WIX 51459 specifications
How matching is scored| Specification | Donaldson P550909 | WIX 51459 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 72 mm | 71.98 mm |
| Gasket ID | 62 mm | 62.53 mm |
| Can OD | 93 mm | 93.83 mm |
| Height | 176 mm | 178 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Not applicable | 13 - 19 |
| Anti-drainback valve | No | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD is identical at 72 mm.
Gasket ID differs by 0.5 mm (Donaldson P550909: 62 mm, WIX 51459: 62.53 mm).
WIX 51459 is 2 mm taller (Donaldson P550909: 176 mm, WIX 51459: 178 mm) -- check clearance before substituting.
Can OD differs by 0.8 mm (Donaldson P550909: 93 mm, WIX 51459: 93.83 mm).
Bypass valve presence differs: WIX 51459 has one, Donaldson P550909 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.