FRAM PH3600 vs Baldwin B159: Oil Filter Compatibility
Compare FRAM PH3600 and Baldwin B159 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 3/4-16 thread.
Quick verdict
Both use a 3/4-16 thread.
- 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.
FRAM PH3600 and Baldwin B159 specifications
How matching is scored| Specification | FRAM PH3600 | Baldwin B159 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 71.1 mm | 71.98 mm |
| Gasket ID | 62.5 mm | 62.53 mm |
| Can OD | 75.794 mm | 76.2 mm |
| Height | 125.019 mm | 103.2 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 | 8 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.9 mm (FRAM PH3600: 71.1 mm, Baldwin B159: 71.98 mm).
Gasket ID is identical at 62.5 mm.
FRAM PH3600 is 21.8 mm taller (FRAM PH3600: 125.019 mm, Baldwin B159: 103.2 mm) -- check clearance before substituting.
Can OD differs by 0.4 mm (FRAM PH3600: 75.794 mm, Baldwin B159: 76.2 mm).
Both open their bypass valve in a comparable range: FRAM PH3600 at 12-12 psi, Baldwin B159 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.