Mobil 1 (ExxonMobil / Mann+Hummel) M1-403A vs Donaldson P502503: Oil Filter Compatibility
Compare Mobil 1 (ExxonMobil / Mann+Hummel) M1-403A and Donaldson P502503 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 1-16 thread.
Quick verdict
Closest known dimensional difference: height -8.5 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.
Mobil 1 (ExxonMobil / Mann+Hummel) M1-403A and Donaldson P502503 specifications
How matching is scored| Specification | Mobil 1 (ExxonMobil / Mann+Hummel) M1-403A | Donaldson P502503 |
|---|---|---|
| Thread size | 1-16 | 1-16 |
| Gasket OD | 71 mm | 67 mm |
| Gasket ID | 62 mm | 62 mm |
| Can OD | 93.73 mm | 93 mm |
| Height | 173.48 mm | 165 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 - 15 | 11 - 17 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 1-16.
Gasket OD differs by 4 mm (Mobil 1 (ExxonMobil / Mann+Hummel) M1-403A: 71 mm, Donaldson P502503: 67 mm).
Gasket ID is identical at 62 mm.
Mobil 1 (ExxonMobil / Mann+Hummel) M1-403A is 8.5 mm taller (Mobil 1 (ExxonMobil / Mann+Hummel) M1-403A: 173.48 mm, Donaldson P502503: 165 mm) -- check clearance before substituting.
Can OD differs by 0.7 mm (Mobil 1 (ExxonMobil / Mann+Hummel) M1-403A: 93.73 mm, Donaldson P502503: 93 mm).
Both open their bypass valve in a comparable range: Mobil 1 (ExxonMobil / Mann+Hummel) M1-403A at 12-15 psi, Donaldson P502503 at 11-17 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.