NAPA Gold 1348 vs MAHLE OC 981: Oil Filter Compatibility
Compare NAPA Gold 1348 and MAHLE OC 981 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.
NAPA Gold 1348 and MAHLE OC 981 specifications
How matching is scored| Specification | NAPA Gold 1348 | MAHLE OC 981 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 69.4 mm | 72 mm |
| Gasket ID | 61.7 mm | 62 mm |
| Can OD | 74.19 mm | 76.2 mm |
| Height | 86.46 mm | 89.66 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 13 - 19 | 18 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 2.6 mm (NAPA Gold 1348: 69.4 mm, MAHLE OC 981: 72 mm).
Gasket ID differs by 0.3 mm (NAPA Gold 1348: 61.7 mm, MAHLE OC 981: 62 mm).
MAHLE OC 981 is 3.2 mm taller (NAPA Gold 1348: 86.46 mm, MAHLE OC 981: 89.66 mm) -- check clearance before substituting.
Can OD differs by 2 mm (NAPA Gold 1348: 74.19 mm, MAHLE OC 981: 76.2 mm).
Both open their bypass valve in a comparable range: NAPA Gold 1348 at 13-19 psi, MAHLE OC 981 at 18-18 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.