Donaldson P550965 vs WIX WL7443: Oil Filter Compatibility
Compare Donaldson P550965 and WIX WL7443 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 M22x1.5 thread.
Quick verdict
Both use a M22x1.5 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.
Donaldson P550965 and WIX WL7443 specifications
How matching is scored| Specification | Donaldson P550965 | WIX WL7443 |
|---|---|---|
| Thread size | M22x1.5 | M22x1.5 |
| Gasket OD | 71 mm | 71.88 mm |
| Gasket ID | 61 mm | 61.98 mm |
| Can OD | 93 mm | 94 mm |
| Height | 91 mm | 70.1 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 - 17 | 14 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M22x1.5.
Gasket OD differs by 0.9 mm (Donaldson P550965: 71 mm, WIX WL7443: 71.88 mm).
Gasket ID differs by 1 mm (Donaldson P550965: 61 mm, WIX WL7443: 61.98 mm).
Donaldson P550965 is 20.9 mm taller (Donaldson P550965: 91 mm, WIX WL7443: 70.1 mm) -- check clearance before substituting.
Can OD differs by 1 mm (Donaldson P550965: 93 mm, WIX WL7443: 94 mm).
Both open their bypass valve in a comparable range: Donaldson P550965 at 12-17 psi, WIX WL7443 at 14-14 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.