FRAM PH4879 vs FRAM PH8842: Oil Filter Compatibility
Compare FRAM PH4879 and FRAM PH8842 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 11/8-16 thread.
Quick verdict
Closest known dimensional difference: height +20 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.
FRAM PH4879 and FRAM PH8842 specifications
How matching is scored| Specification | FRAM PH4879 | FRAM PH8842 |
|---|---|---|
| Thread size | 1"1/8-16 | 1"1/8-16 |
| Gasket OD | 72 mm | 71.1 mm |
| Gasket ID | 62 mm | 62.5 mm |
| Can OD | 76 mm | 76 mm |
| Height | 80 mm | 100 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 | 12 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 11/8-16.
Gasket OD differs by 0.9 mm (FRAM PH4879: 72 mm, FRAM PH8842: 71.1 mm).
Gasket ID differs by 0.5 mm (FRAM PH4879: 62 mm, FRAM PH8842: 62.5 mm).
FRAM PH8842 is 20 mm taller (FRAM PH4879: 80 mm, FRAM PH8842: 100 mm) -- check clearance before substituting.
Can OD is identical at 76 mm.
Both open their bypass valve in a comparable range: FRAM PH4879 at 12-12 psi, FRAM PH8842 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.