LUBER-FINER PH820 vs Donaldson P550965: Oil Filter Compatibility
Compare LUBER-FINER PH820 and Donaldson P550965 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
Large bypass PSI mismatch: 7.5 psi
- 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.
LUBER-FINER PH820 and Donaldson P550965 specifications
How matching is scored| Specification | LUBER-FINER PH820 | Donaldson P550965 |
|---|---|---|
| Thread size | M22x1.5 | M22x1.5 |
| Gasket OD | 71 mm | 71 mm |
| Gasket ID | 62 mm | 61 mm |
| Can OD | 93 mm | 93 mm |
| Height | 101.09 mm | 91 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 22 | 12 - 17 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M22x1.5.
Gasket OD is identical at 71 mm.
Gasket ID differs by 1 mm (LUBER-FINER PH820: 62 mm, Donaldson P550965: 61 mm).
LUBER-FINER PH820 is 10.1 mm taller (LUBER-FINER PH820: 101.09 mm, Donaldson P550965: 91 mm) -- check clearance before substituting.
Can OD is identical at 93 mm.
Both open their bypass valve in a comparable range: LUBER-FINER PH820 at 22-22 psi, Donaldson P550965 at 12-17 psi -- these ranges do not overlap.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.