Fleetguard LF3959 vs Fleetguard LF17494: Oil Filter Compatibility
Compare Fleetguard LF3959 and Fleetguard LF17494 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 1-16 thread.
Quick verdict
Bypass presence unknown on one or both filters · ADBV 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 LF3959 and Fleetguard LF17494 specifications
How matching is scored| Specification | Fleetguard LF3959 | Fleetguard LF17494 |
|---|---|---|
| Thread size | 1-16 UN-2B | 1-16 UN-2B |
| Gasket OD | 71.88 mm | 72 mm |
| Gasket ID | 62.48 mm | 62.5 mm |
| Can OD | 93 mm | 93 mm |
| Height | 176 mm | 168 mm |
| Internal bypass valve | Unknown | Unknown |
| Bypass PSID | Unknown | Unknown |
| Anti-drainback valve | Unknown | Unknown |
What matters in this specific comparison
Thread size matches: both are 1-16.
Gasket OD differs by 0.1 mm (Fleetguard LF3959: 71.88 mm, Fleetguard LF17494: 72 mm).
Gasket ID is identical at 62.48 mm.
Fleetguard LF3959 is 8 mm taller (Fleetguard LF3959: 176 mm, Fleetguard LF17494: 168 mm) -- check clearance before substituting.
Can OD is identical at 93 mm.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.