WIX 51661 vs FRAM PH5317: Oil Filter Compatibility
Compare WIX 51661 and FRAM PH5317 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 51661 and FRAM PH5317 specifications
How matching is scored| Specification | WIX 51661 | FRAM PH5317 |
|---|---|---|
| Thread size | M20x1.5 | M20X1,5 |
| Gasket OD | 63 mm | 62.5 mm |
| Gasket ID | 55.1 mm | 54.4 mm |
| Can OD | 68.3 mm | 68 mm |
| Height | 86.4 mm | 85 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 13 - 19 | 12 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M20x1.5.
Gasket OD differs by 0.5 mm (WIX 51661: 63 mm, FRAM PH5317: 62.5 mm).
Gasket ID differs by 0.7 mm (WIX 51661: 55.1 mm, FRAM PH5317: 54.4 mm).
WIX 51661 is 1.4 mm taller (WIX 51661: 86.4 mm, FRAM PH5317: 85 mm) -- check clearance before substituting.
Can OD differs by 0.3 mm (WIX 51661: 68.3 mm, FRAM PH5317: 68 mm).
Both open their bypass valve in a comparable range: WIX 51661 at 13-19 psi, FRAM PH5317 at 12-12 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.