WIX 51844 vs WIX 51444: Oil Filter Compatibility
Compare WIX 51844 and WIX 51444 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 11/8-16 thread.
Quick verdict
Both use a 11/8-16 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 51844 and WIX 51444 specifications
How matching is scored| Specification | WIX 51844 | WIX 51444 |
|---|---|---|
| Thread size | 11/8-16 | 11/8-16 |
| Gasket OD | 100.1 mm | 101.1 mm |
| Gasket ID | 90.93 mm | 91.44 mm |
| Can OD | 107.4 mm | 108.8 mm |
| Height | 166.6 mm | 167 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 8 - 11 | 8 - 11 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 11/8-16.
Gasket OD differs by 1 mm (WIX 51844: 100.1 mm, WIX 51444: 101.1 mm).
Gasket ID differs by 0.5 mm (WIX 51844: 90.93 mm, WIX 51444: 91.44 mm).
WIX 51444 is 0.4 mm taller (WIX 51844: 166.6 mm, WIX 51444: 167 mm) -- check clearance before substituting.
Can OD differs by 1.4 mm (WIX 51844: 107.4 mm, WIX 51444: 108.8 mm).
Both open their bypass valve in a comparable range: WIX 51844 at 8-11 psi, WIX 51444 at 8-11 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.