LUBER-FINER PH561 vs Fleetguard LF551A: Oil Filter Compatibility
Compare LUBER-FINER PH561 and Fleetguard LF551A 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.
LUBER-FINER PH561 and Fleetguard LF551A specifications
How matching is scored| Specification | LUBER-FINER PH561 | Fleetguard LF551A |
|---|---|---|
| Thread size | 3/4-16UNF | 3/4-16 UNF-2B |
| Gasket OD | 71 mm | 71.98 mm |
| Gasket ID | 62 mm | 62.53 mm |
| Can OD | 74.68 mm | 96 mm |
| Height | 112.78 mm | 137 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 8 - 11 | 10.01 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 1 mm (LUBER-FINER PH561: 71 mm, Fleetguard LF551A: 71.98 mm).
Gasket ID differs by 0.5 mm (LUBER-FINER PH561: 62 mm, Fleetguard LF551A: 62.53 mm).
Fleetguard LF551A is 24.2 mm taller (LUBER-FINER PH561: 112.78 mm, Fleetguard LF551A: 137 mm) -- check clearance before substituting.
Can OD differs by 21.3 mm (LUBER-FINER PH561: 74.68 mm, Fleetguard LF551A: 96 mm).
Both open their bypass valve in a comparable range: LUBER-FINER PH561 at 8-11 psi, Fleetguard LF551A at 10.01-10.01 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.