WIX WL7421 vs Champ PH820: Oil Filter Compatibility
Compare WIX WL7421 and Champ PH820 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 M22x1.5 thread.
Quick verdict
Closest known dimensional difference: height -72.2 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.
WIX WL7421 and Champ PH820 specifications
How matching is scored| Specification | WIX WL7421 | Champ PH820 |
|---|---|---|
| Thread size | M22x1.5 | M22x1.5 |
| Gasket OD | 70.87 mm | 70.4 mm |
| Gasket ID | 61.98 mm | 62.2 mm |
| Can OD | 94 mm | 93.73 mm |
| Height | 170 mm | 97.79 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 14 | 8 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M22x1.5.
Gasket OD differs by 0.5 mm (WIX WL7421: 70.87 mm, Champ PH820: 70.4 mm).
Gasket ID differs by 0.2 mm (WIX WL7421: 61.98 mm, Champ PH820: 62.2 mm).
WIX WL7421 is 72.2 mm taller (WIX WL7421: 170 mm, Champ PH820: 97.79 mm) -- check clearance before substituting.
Can OD differs by 0.3 mm (WIX WL7421: 94 mm, Champ PH820: 93.73 mm).
Both open their bypass valve in a comparable range: WIX WL7421 at 14-14 psi, Champ PH820 at 8-8 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.