Fleetguard LF3390 vs Fleetguard LF647: Oil Filter Compatibility
Compare Fleetguard LF3390 and Fleetguard LF647 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
Both use a 13/16-16 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.
Fleetguard LF3390 and Fleetguard LF647 specifications
How matching is scored| Specification | Fleetguard LF3390 | Fleetguard LF647 |
|---|---|---|
| Thread size | 13/16-16 UNS-2B | 13/16-16 UNS-2B |
| Gasket OD | 71.98 mm | 71.88 mm |
| Gasket ID | 62.53 mm | 62.48 mm |
| Can OD | 94 mm | 96 mm |
| Height | 109 mm | 107 mm |
| Internal bypass valve | No | No |
| Bypass PSID | Not applicable | Not applicable |
| Anti-drainback valve | No | Yes |
What matters in this specific comparison
Thread size matches: both are 13/16-16.
Gasket OD differs by 0.1 mm (Fleetguard LF3390: 71.98 mm, Fleetguard LF647: 71.88 mm).
Gasket ID differs by 0.1 mm (Fleetguard LF3390: 62.53 mm, Fleetguard LF647: 62.48 mm).
Fleetguard LF3390 is 2 mm taller (Fleetguard LF3390: 109 mm, Fleetguard LF647: 107 mm) -- check clearance before substituting.
Can OD differs by 2 mm (Fleetguard LF3390: 94 mm, Fleetguard LF647: 96 mm).
Anti-drainback valve differs: Fleetguard LF647 has one, Fleetguard LF3390 does not.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.