Baldwin BT348 vs FRAM PH3569: Oil Filter Compatibility
Compare Baldwin BT348 and FRAM PH3569 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
Closest known dimensional difference: height -7.6 mm. Verify application-specific requirements before substituting.
- 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 BT348 and FRAM PH3569 specifications
How matching is scored| Specification | Baldwin BT348 | FRAM PH3569 |
|---|---|---|
| Thread size | 3/4-16 | 3/4"-16 |
| Gasket OD | 71.4 mm | 71 mm |
| Gasket ID | 62.7 mm | 63 mm |
| Can OD | 108 mm | 93 mm |
| Height | 147.6 mm | 140 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 30 | 31.908 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.4 mm (Baldwin BT348: 71.4 mm, FRAM PH3569: 71 mm).
Gasket ID differs by 0.3 mm (Baldwin BT348: 62.7 mm, FRAM PH3569: 63 mm).
Baldwin BT348 is 7.6 mm taller (Baldwin BT348: 147.6 mm, FRAM PH3569: 140 mm) -- check clearance before substituting.
Can OD differs by 15 mm (Baldwin BT348: 108 mm, FRAM PH3569: 93 mm).
Both open their bypass valve in a comparable range: Baldwin BT348 at 30-30 psi, FRAM PH3569 at 31.908-31.908 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.