MAHLE OC 34 vs WIX 51191: Oil Filter Compatibility
Compare MAHLE OC 34 and WIX 51191 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.
MAHLE OC 34 and WIX 51191 specifications
How matching is scored| Specification | MAHLE OC 34 | WIX 51191 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 71.5 mm | 71.98 mm |
| Gasket ID | 62.5 mm | 62.53 mm |
| Can OD | 77.47 mm | 92.96 mm |
| Height | 149.86 mm | 131.5 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 14 | 13 - 19 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.5 mm (MAHLE OC 34: 71.5 mm, WIX 51191: 71.98 mm).
Gasket ID is identical at 62.5 mm.
MAHLE OC 34 is 18.4 mm taller (MAHLE OC 34: 149.86 mm, WIX 51191: 131.5 mm) -- check clearance before substituting.
Can OD differs by 15.5 mm (MAHLE OC 34: 77.47 mm, WIX 51191: 92.96 mm).
Both open their bypass valve in a comparable range: MAHLE OC 34 at 14-14 psi, WIX 51191 at 13-19 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.