WIX 51791XD vs WIX 51800: Oil Filter Compatibility
Compare WIX 51791XD and WIX 51800 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 11/8-16 thread.
Quick verdict
Large bypass PSI mismatch: 14 psi
- 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 51791XD and WIX 51800 specifications
How matching is scored| Specification | WIX 51791XD | WIX 51800 |
|---|---|---|
| Thread size | 11/8-16 | 11/8-16 |
| Gasket OD | 100.8 mm | 100.8 mm |
| Gasket ID | 91.11 mm | 91.11 mm |
| Can OD | 108.8 mm | 108.5 mm |
| Height | 263.27 mm | 263.27 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 13 - 19 | 30 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 11/8-16.
Gasket OD is identical at 100.8 mm.
Gasket ID is identical at 91.11 mm.
Height is identical at 263.27 mm.
Can OD differs by 0.3 mm (WIX 51791XD: 108.8 mm, WIX 51800: 108.5 mm).
Both open their bypass valve in a comparable range: WIX 51791XD at 13-19 psi, WIX 51800 at 30-30 psi -- these ranges do not overlap.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.