WIX 51393 vs FRAM PH43: Oil Filter Compatibility
Compare WIX 51393 and FRAM PH43 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.
WIX 51393 and FRAM PH43 specifications
How matching is scored| Specification | WIX 51393 | FRAM PH43 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 71.12 mm | 71.1 mm |
| Gasket ID | 62.23 mm | 62.5 mm |
| Can OD | 76.7 mm | 93.7 mm |
| Height | 122 mm | 111.1 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 3/4-16.
Gasket OD is identical at 71.12 mm.
Gasket ID differs by 0.3 mm (WIX 51393: 62.23 mm, FRAM PH43: 62.5 mm).
WIX 51393 is 10.9 mm taller (WIX 51393: 122 mm, FRAM PH43: 111.1 mm) -- check clearance before substituting.
Can OD differs by 17 mm (WIX 51393: 76.7 mm, FRAM PH43: 93.7 mm).
Both open their bypass valve in a comparable range: WIX 51393 at 13-19 psi, FRAM PH43 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.