Fleetguard LF3378 vs FRAM PH16: Oil Filter Compatibility
Compare Fleetguard LF3378 and FRAM PH16 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
Large bypass PSI mismatch: 24.3 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.
Fleetguard LF3378 and FRAM PH16 specifications
How matching is scored| Specification | Fleetguard LF3378 | FRAM PH16 |
|---|---|---|
| Thread size | 3/4-16 UNF-2B | 3/4-16 |
| Gasket OD | 71.98 mm | 71.04 mm |
| Gasket ID | 62.53 mm | 61.47 mm |
| Can OD | 94 mm | 92.86 mm |
| Height | 92 mm | 93.68 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 36.26 | 12 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.9 mm (Fleetguard LF3378: 71.98 mm, FRAM PH16: 71.04 mm).
Gasket ID differs by 1.1 mm (Fleetguard LF3378: 62.53 mm, FRAM PH16: 61.47 mm).
FRAM PH16 is 1.7 mm taller (Fleetguard LF3378: 92 mm, FRAM PH16: 93.68 mm) -- check clearance before substituting.
Can OD differs by 1.1 mm (Fleetguard LF3378: 94 mm, FRAM PH16: 92.86 mm).
Both open their bypass valve in a comparable range: Fleetguard LF3378 at 36.26-36.26 psi, FRAM PH16 at 12-12 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.