WIX 51050 vs NAPA Gold 1051: Oil Filter Compatibility
Compare WIX 51050 and NAPA Gold 1051 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 5/8-18 thread.
Quick verdict
Bypass presence unknown on one or both filters · ADBV unknown on one or both filters
- 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 51050 and NAPA Gold 1051 specifications
How matching is scored| Specification | WIX 51050 | NAPA Gold 1051 |
|---|---|---|
| Thread size | 5/8-18 | 5/8-18 |
| Gasket OD | 71.98 mm | 70.1 mm |
| Gasket ID | 62.53 mm | 62.5 mm |
| Can OD | 92.96 mm | 92.96 mm |
| Height | 131.5 mm | 110.2 mm |
| Internal bypass valve | Yes | Unknown |
| Bypass PSID | 16 | Unknown |
| Anti-drainback valve | Yes | Unknown |
What matters in this specific comparison
Thread size matches: both are 5/8-18.
Gasket OD differs by 1.9 mm (WIX 51050: 71.98 mm, NAPA Gold 1051: 70.1 mm).
Gasket ID is identical at 62.53 mm.
WIX 51050 is 21.3 mm taller (WIX 51050: 131.5 mm, NAPA Gold 1051: 110.2 mm) -- check clearance before substituting.
Can OD is identical at 92.96 mm.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.