FRAM PH5594 vs WIX 51301: Oil Filter Compatibility
Compare FRAM PH5594 and WIX 51301 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
Closest known dimensional difference: height +3.9 mm. Verify application-specific requirements before substituting.
- 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.
FRAM PH5594 and WIX 51301 specifications
How matching is scored| Specification | FRAM PH5594 | WIX 51301 |
|---|---|---|
| Thread size | M20X1,5 | M20x1.5 |
| Gasket OD | 63 mm | 63.25 mm |
| Gasket ID | 52 mm | 51.05 mm |
| Can OD | 68 mm | 82.35 mm |
| Height | 85 mm | 81.13 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 | 8 - 11 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M20x1.5.
Gasket OD differs by 0.3 mm (FRAM PH5594: 63 mm, WIX 51301: 63.25 mm).
Gasket ID differs by 1 mm (FRAM PH5594: 52 mm, WIX 51301: 51.05 mm).
FRAM PH5594 is 3.9 mm taller (FRAM PH5594: 85 mm, WIX 51301: 81.13 mm) -- check clearance before substituting.
Can OD differs by 14.3 mm (FRAM PH5594: 68 mm, WIX 51301: 82.35 mm).
Both open their bypass valve in a comparable range: FRAM PH5594 at 12-12 psi, WIX 51301 at 8-11 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.