FRAM PH8933 vs Baldwin BD28: Oil Filter Compatibility
Compare FRAM PH8933 and Baldwin BD28 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 M26x1.5 thread.
Quick verdict
Large bypass PSI mismatch: 8 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.
FRAM PH8933 and Baldwin BD28 specifications
How matching is scored| Specification | FRAM PH8933 | Baldwin BD28 |
|---|---|---|
| Thread size | M26X1,5 | M26x1.5 |
| Gasket OD | 72 mm | 71.4 mm |
| Gasket ID | 62 mm | 62.7 mm |
| Can OD | 93 mm | 93.7 mm |
| Height | 142 mm | 136.5 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 | 20 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M26x1.5.
Gasket OD differs by 0.6 mm (FRAM PH8933: 72 mm, Baldwin BD28: 71.4 mm).
Gasket ID differs by 0.7 mm (FRAM PH8933: 62 mm, Baldwin BD28: 62.7 mm).
FRAM PH8933 is 5.5 mm taller (FRAM PH8933: 142 mm, Baldwin BD28: 136.5 mm) -- check clearance before substituting.
Can OD differs by 0.7 mm (FRAM PH8933: 93 mm, Baldwin BD28: 93.7 mm).
Both open their bypass valve in a comparable range: FRAM PH8933 at 12-12 psi, Baldwin BD28 at 20-20 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.