Champ PH3980 vs FRAM PH4701: Oil Filter Compatibility
Compare Champ PH3980 and FRAM PH4701 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.
Champ PH3980 and FRAM PH4701 specifications
| Specification | Champ PH3980 | FRAM PH4701 |
|---|---|---|
| Thread size | M18x1.5 | M18X1,5 |
| Gasket OD | 70.1 mm | 72 mm |
| Gasket ID | 62.5 mm | 62 mm |
| Can OD | 77.47 mm | 76 mm |
| Height | 116.08 mm | 120 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Unknown | 12 |
| 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
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Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.