Fleetguard LF796 vs Fleetguard LF3945: Oil Filter Compatibility
Compare Fleetguard LF796 and Fleetguard LF3945 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 13/16-16 thread.
Quick verdict
Bypass presence unknown on one or both filters
- 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 LF796 and Fleetguard LF3945 specifications
How matching is scored| Specification | Fleetguard LF796 | Fleetguard LF3945 |
|---|---|---|
| Thread size | 13/16-16 UNS-2B | 13/16-16 UNS-2B |
| Gasket OD | 71.98 mm | 71.98 mm |
| Gasket ID | 62.53 mm | 62.53 mm |
| Can OD | 77 mm | 77 mm |
| Height | 89 mm | 105 mm |
| Internal bypass valve | No | Unknown |
| Bypass PSID | Not applicable | Unknown |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 13/16-16.
Gasket OD is identical at 71.98 mm.
Gasket ID is identical at 62.53 mm.
Fleetguard LF3945 is 16 mm taller (Fleetguard LF796: 89 mm, Fleetguard LF3945: 105 mm) -- check clearance before substituting.
Can OD is identical at 77 mm.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.