Donaldson P550371 vs WIX 51734XE: Oil Filter Compatibility
Compare Donaldson P550371 and WIX 51734XE 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 11/2-16 thread.
Quick verdict
Candidate adds internal bypass; usually redundant with engine-mounted bypass
- 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 P550371 and WIX 51734XE specifications
How matching is scored| Specification | Donaldson P550371 | WIX 51734XE |
|---|---|---|
| Thread size | 11/2-16 | 11/2-16 |
| Gasket OD | 99 mm | 100.8 mm |
| Gasket ID | 90 mm | 91.11 mm |
| Can OD | 108 mm | 108.4 mm |
| Height | 204 mm | 206.3 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Not applicable | 8 - 11 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 11/2-16.
Gasket OD differs by 1.8 mm (Donaldson P550371: 99 mm, WIX 51734XE: 100.8 mm).
Gasket ID differs by 1.1 mm (Donaldson P550371: 90 mm, WIX 51734XE: 91.11 mm).
WIX 51734XE is 2.3 mm taller (Donaldson P550371: 204 mm, WIX 51734XE: 206.3 mm) -- check clearance before substituting.
Can OD differs by 0.4 mm (Donaldson P550371: 108 mm, WIX 51734XE: 108.4 mm).
Bypass valve presence differs: WIX 51734XE has one, Donaldson P550371 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.