Bosch 3323 vs FRAM PH2856: Oil Filter Compatibility
Compare Bosch 3323 and FRAM PH2856 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.
Bosch 3323 and FRAM PH2856 specifications
How matching is scored| Specification | Bosch 3323 | FRAM PH2856 |
|---|---|---|
| Thread size | M20x1.5 | M20X1,5 |
| Gasket OD | 63 mm | 63 mm |
| Gasket ID | 52 mm | 52 mm |
| Can OD | 70 mm | 68 mm |
| Height | 89.41 mm | 85 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 - 15 | 12 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M20x1.5.
Gasket OD is identical at 63 mm.
Gasket ID is identical at 52 mm.
Bosch 3323 is 4.4 mm taller (Bosch 3323: 89.41 mm, FRAM PH2856: 85 mm) -- check clearance before substituting.
Can OD differs by 2 mm (Bosch 3323: 70 mm, FRAM PH2856: 68 mm).
Both open their bypass valve in a comparable range: Bosch 3323 at 12-15 psi, FRAM PH2856 at 12-12 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.