Baldwin B141 vs NAPA Gold 1580: Oil Filter Compatibility
Compare Baldwin B141 and NAPA Gold 1580 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
Large bypass PSI mismatch: 10.5 psi
- 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 NAPA Gold 1580 specifications
How matching is scored| Specification | Baldwin B141 | NAPA Gold 1580 |
|---|---|---|
| Thread size | M20x1.5 | M20x1.5 |
| Gasket OD | 71.4 mm | 72 mm |
| Gasket ID | 62.7 mm | 63 mm |
| Can OD | 93.7 mm | 93.04 mm |
| Height | 98.4 mm | 96.82 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 20 | 8 - 11 |
| 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, NAPA Gold 1580: 72 mm).
Gasket ID differs by 0.3 mm (Baldwin B141: 62.7 mm, NAPA Gold 1580: 63 mm).
Baldwin B141 is 1.6 mm taller (Baldwin B141: 98.4 mm, NAPA Gold 1580: 96.82 mm) -- check clearance before substituting.
Can OD differs by 0.7 mm (Baldwin B141: 93.7 mm, NAPA Gold 1580: 93.04 mm).
Both open their bypass valve in a comparable range: Baldwin B141 at 20-20 psi, NAPA Gold 1580 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.