Fleetguard LF3689 vs WIX 51675: Oil Filter Compatibility
Compare Fleetguard LF3689 and WIX 51675 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 M26x1.5 thread.
Quick verdict
Closest known dimensional difference: gasket ID -2.5 mm. Verify application-specific requirements before substituting.
- 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 LF3689 and WIX 51675 specifications
How matching is scored| Specification | Fleetguard LF3689 | WIX 51675 |
|---|---|---|
| Thread size | M26x1.5 | M26x1.5 |
| Gasket OD | 72.14 mm | 71.98 mm |
| Gasket ID | 65 mm | 62.53 mm |
| Can OD | 105 mm | 108.8 mm |
| Height | 150 mm | 151.9 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 10 - 12 | 12 - 15 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M26x1.5.
Gasket OD differs by 0.2 mm (Fleetguard LF3689: 72.14 mm, WIX 51675: 71.98 mm).
Gasket ID differs by 2.5 mm (Fleetguard LF3689: 65 mm, WIX 51675: 62.53 mm).
WIX 51675 is 1.9 mm taller (Fleetguard LF3689: 150 mm, WIX 51675: 151.9 mm) -- check clearance before substituting.
Can OD differs by 3.8 mm (Fleetguard LF3689: 105 mm, WIX 51675: 108.8 mm).
Both open their bypass valve in a comparable range: Fleetguard LF3689 at 10-12 psi, WIX 51675 at 12-15 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.