WIX 51381 vs LUBER-FINER PH2903: Oil Filter Compatibility
Compare WIX 51381 and LUBER-FINER PH2903 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 M20x1.5 thread.
Quick verdict
Both use a M20x1.5 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.
WIX 51381 and LUBER-FINER PH2903 specifications
How matching is scored| Specification | WIX 51381 | LUBER-FINER PH2903 |
|---|---|---|
| Thread size | M20x1.5 | M20x1.5 |
| Gasket OD | 71.98 mm | 72 mm |
| Gasket ID | 62.53 mm | 62 mm |
| Can OD | 92.99 mm | 75.18 mm |
| Height | 80 mm | 86.36 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 - 15 | 11 - 17 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M20x1.5.
Gasket OD is identical at 71.98 mm.
Gasket ID differs by 0.5 mm (WIX 51381: 62.53 mm, LUBER-FINER PH2903: 62 mm).
LUBER-FINER PH2903 is 6.4 mm taller (WIX 51381: 80 mm, LUBER-FINER PH2903: 86.36 mm) -- check clearance before substituting.
Can OD differs by 17.8 mm (WIX 51381: 92.99 mm, LUBER-FINER PH2903: 75.18 mm).
Both open their bypass valve in a comparable range: WIX 51381 at 12-15 psi, LUBER-FINER PH2903 at 11-17 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.