Baldwin B141 vs WIX 51381: Oil Filter Compatibility
Compare Baldwin B141 and WIX 51381 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 M20x1.5 thread.
Quick verdict
Both use a M20x1.5 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.
Baldwin B141 and WIX 51381 specifications
How matching is scored| Specification | Baldwin B141 | WIX 51381 |
|---|---|---|
| Thread size | M20x1.5 | M20x1.5 |
| Gasket OD | 71.4 mm | 71.98 mm |
| Gasket ID | 62.7 mm | 62.53 mm |
| Can OD | 93.7 mm | 92.99 mm |
| Height | 98.4 mm | 80 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 20 | 12 - 15 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M20x1.5.
Gasket OD differs by 0.6 mm (Baldwin B141: 71.4 mm, WIX 51381: 71.98 mm).
Gasket ID differs by 0.2 mm (Baldwin B141: 62.7 mm, WIX 51381: 62.53 mm).
Baldwin B141 is 18.4 mm taller (Baldwin B141: 98.4 mm, WIX 51381: 80 mm) -- check clearance before substituting.
Can OD differs by 0.7 mm (Baldwin B141: 93.7 mm, WIX 51381: 92.99 mm).
Both open their bypass valve in a comparable range: Baldwin B141 at 20-20 psi, WIX 51381 at 12-15 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.