WIX 51351 vs Fleetguard LF3565: Oil Filter Compatibility
Compare WIX 51351 and Fleetguard LF3565 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.
Quick verdict
Large gasket OD variation · Large gasket ID variation
- 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.
WIX 51351 and Fleetguard LF3565 specifications
| Specification | WIX 51351 | Fleetguard LF3565 |
|---|---|---|
| Thread size | 11/8-16 | 11/8-16UN-2B |
| Gasket OD | 100.8 mm | 99.95 mm |
| Gasket ID | 91.11 mm | 90.55 mm |
| Can OD | 108.9 mm | 110 mm |
| Height | 184.5 mm | 187 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 8 - 11 | 23.21 |
| Anti-drainback valve | Yes | Yes |
What matters most in this comparison?
Thread match: A direct spin-on substitute starts with the same thread size. If the threads differ, the comparison stops there.
Gasket fit: Even when thread size matches, the gasket outside diameter and inside diameter still control whether the filter seals safely against the mounting surface.
Height difference: Small height differences may be acceptable, but longer filters can create clearance problems in tighter installations.
Valve behavior: Bypass and anti-drainback differences can matter in real-world service, especially on cold start or in applications sensitive to oil drain-back.
Related filter pages
- WIX 51351 oil filter cross reference
- Fleetguard LF3565 oil filter cross reference
- WIX 51444 oil filter cross reference
- WIX 51844 oil filter cross reference
- Fleetguard LF3484 oil filter cross reference
- FRAM PH4469 oil filter cross reference
- WIX WL10308 oil filter cross reference
- WIX WL10291 oil filter cross reference
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.