Baldwin B1428 vs Mobil 1 (ExxonMobil / Mann+Hummel) M1-303A: Oil Filter Compatibility
Compare Baldwin B1428 and Mobil 1 (ExxonMobil / Mann+Hummel) M1-303A 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
Candidate adds internal bypass; usually redundant with engine-mounted bypass
- 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 B1428 and Mobil 1 (ExxonMobil / Mann+Hummel) M1-303A specifications
How matching is scored| Specification | Baldwin B1428 | Mobil 1 (ExxonMobil / Mann+Hummel) M1-303A |
|---|---|---|
| Thread size | 13/16-16 | 13/16-16 |
| Gasket OD | 91 mm | 88 mm |
| Gasket ID | 80 mm | 79 mm |
| Can OD | 93.7 mm | 93.73 mm |
| Height | 135.7 mm | 136.65 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Not applicable | 12 - 15 |
| 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 (Baldwin B1428: 91 mm, Mobil 1 (ExxonMobil / Mann+Hummel) M1-303A: 88 mm).
Gasket ID differs by 1 mm (Baldwin B1428: 80 mm, Mobil 1 (ExxonMobil / Mann+Hummel) M1-303A: 79 mm).
Mobil 1 (ExxonMobil / Mann+Hummel) M1-303A is 1 mm taller (Baldwin B1428: 135.7 mm, Mobil 1 (ExxonMobil / Mann+Hummel) M1-303A: 136.65 mm) -- check clearance before substituting.
Can OD is identical at 93.7 mm.
Bypass valve presence differs: Mobil 1 (ExxonMobil / Mann+Hummel) M1-303A has one, Baldwin B1428 does not.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.