Donaldson P550963 vs NAPA Gold 7100: Oil Filter Compatibility
Compare Donaldson P550963 and NAPA Gold 7100 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
Candidate adds internal bypass; usually redundant with engine-mounted bypass
- 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.
Donaldson P550963 and NAPA Gold 7100 specifications
How matching is scored| Specification | Donaldson P550963 | NAPA Gold 7100 |
|---|---|---|
| Thread size | M22x1.5 | M22x1.5 |
| Gasket OD | 72 mm | 69 mm |
| Gasket ID | 63 mm | 62 mm |
| Can OD | 93 mm | 93.17 mm |
| Height | 94 mm | 97.43 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Not applicable | 8 - 11 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M22x1.5.
Gasket OD differs by 3 mm (Donaldson P550963: 72 mm, NAPA Gold 7100: 69 mm).
Gasket ID differs by 1 mm (Donaldson P550963: 63 mm, NAPA Gold 7100: 62 mm).
NAPA Gold 7100 is 3.4 mm taller (Donaldson P550963: 94 mm, NAPA Gold 7100: 97.43 mm) -- check clearance before substituting.
Can OD differs by 0.2 mm (Donaldson P550963: 93 mm, NAPA Gold 7100: 93.17 mm).
Bypass valve presence differs: NAPA Gold 7100 has one, Donaldson P550963 does not.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.