WIX 51258 vs NAPA Gold 1581: Oil Filter Compatibility
Compare WIX 51258 and NAPA Gold 1581 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 13/16-16 thread.
Quick verdict
Closest known dimensional difference: height +21.3 mm. Verify application-specific requirements before substituting.
- 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 51258 and NAPA Gold 1581 specifications
How matching is scored| Specification | WIX 51258 | NAPA Gold 1581 |
|---|---|---|
| Thread size | 13/16-16 | 13/16-16 |
| Gasket OD | 71.98 mm | 69 mm |
| Gasket ID | 62.53 mm | 62 mm |
| Can OD | 92.96 mm | 92.96 mm |
| Height | 110.2 mm | 131.5 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 - 15 | 8 - 11 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 13/16-16.
Gasket OD differs by 3 mm (WIX 51258: 71.98 mm, NAPA Gold 1581: 69 mm).
Gasket ID differs by 0.5 mm (WIX 51258: 62.53 mm, NAPA Gold 1581: 62 mm).
NAPA Gold 1581 is 21.3 mm taller (WIX 51258: 110.2 mm, NAPA Gold 1581: 131.5 mm) -- check clearance before substituting.
Can OD is identical at 92.96 mm.
Both open their bypass valve in a comparable range: WIX 51258 at 12-15 psi, NAPA Gold 1581 at 8-11 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.