Fleetguard LF3550 vs FRAM XG4386: Oil Filter Compatibility
Compare Fleetguard LF3550 and FRAM XG4386 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
Candidate adds internal bypass; usually redundant with engine-mounted bypass · Candidate adds ADBV
- 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 LF3550 and FRAM XG4386 specifications
How matching is scored| Specification | Fleetguard LF3550 | FRAM XG4386 |
|---|---|---|
| Thread size | 3/4-16 UNF-2B | 3/4-16 |
| Gasket OD | 64.01 mm | 63.5 mm |
| Gasket ID | 57.45 mm | 57.15 mm |
| Can OD | 84 mm | 68.28 mm |
| Height | 101 mm | 88.11 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Not applicable | 14 |
| Anti-drainback valve | No | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.5 mm (Fleetguard LF3550: 64.01 mm, FRAM XG4386: 63.5 mm).
Gasket ID differs by 0.3 mm (Fleetguard LF3550: 57.45 mm, FRAM XG4386: 57.15 mm).
Fleetguard LF3550 is 12.9 mm taller (Fleetguard LF3550: 101 mm, FRAM XG4386: 88.11 mm) -- check clearance before substituting.
Can OD differs by 15.7 mm (Fleetguard LF3550: 84 mm, FRAM XG4386: 68.28 mm).
Bypass valve presence differs: FRAM XG4386 has one, Fleetguard LF3550 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.