Donaldson P559128 vs Baldwin BT230: Oil Filter Compatibility
Compare Donaldson P559128 and Baldwin BT230 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
Closest known dimensional difference: height -10.5 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.
Donaldson P559128 and Baldwin BT230 specifications
How matching is scored| Specification | Donaldson P559128 | Baldwin BT230 |
|---|---|---|
| Thread size | 11/8-16 | 11/8-16 |
| Gasket OD | 72 mm | 71.4 mm |
| Gasket ID | 62 mm | 62.7 mm |
| Can OD | 107 mm | 93.7 mm |
| Height | 147 mm | 136.5 mm |
| Internal bypass valve | No | No |
| Bypass PSID | Not applicable | Not applicable |
| Anti-drainback valve | No | No |
What matters in this specific comparison
Thread size matches: both are 11/8-16.
Gasket OD differs by 0.6 mm (Donaldson P559128: 72 mm, Baldwin BT230: 71.4 mm).
Gasket ID differs by 0.7 mm (Donaldson P559128: 62 mm, Baldwin BT230: 62.7 mm).
Donaldson P559128 is 10.5 mm taller (Donaldson P559128: 147 mm, Baldwin BT230: 136.5 mm) -- check clearance before substituting.
Can OD differs by 13.3 mm (Donaldson P559128: 107 mm, Baldwin BT230: 93.7 mm).
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.