WIX 51647 vs FRAM PH3600: Oil Filter Compatibility
Compare WIX 51647 and FRAM PH3600 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 51647 and FRAM PH3600 specifications
How matching is scored| Specification | WIX 51647 | FRAM PH3600 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 71.98 mm | 71.1 mm |
| Gasket ID | 62.53 mm | 62.5 mm |
| Can OD | 92.96 mm | 75.794 mm |
| Height | 131.5 mm | 125.019 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 - 15 | 12 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.9 mm (WIX 51647: 71.98 mm, FRAM PH3600: 71.1 mm).
Gasket ID is identical at 62.53 mm.
WIX 51647 is 6.5 mm taller (WIX 51647: 131.5 mm, FRAM PH3600: 125.019 mm) -- check clearance before substituting.
Can OD differs by 17.2 mm (WIX 51647: 92.96 mm, FRAM PH3600: 75.794 mm).
Both open their bypass valve in a comparable range: WIX 51647 at 12-15 psi, FRAM PH3600 at 12-12 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.