Baldwin B488 vs Premium Guard PG4612: Oil Filter Compatibility
Compare Baldwin B488 and Premium Guard PG4612 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 M20x1.5 thread.
Quick verdict
Both use a M20x1.5 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.
Baldwin B488 and Premium Guard PG4612 specifications
How matching is scored| Specification | Baldwin B488 | Premium Guard PG4612 |
|---|---|---|
| Thread size | M20x1.5 | M20x1.5 |
| Gasket OD | 64 mm | 62.74 mm |
| Gasket ID | 54.1 mm | 55.37 mm |
| Can OD | 93.7 mm | 65.53 mm |
| Height | 82.6 mm | 76.45 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 20 | 17 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M20x1.5.
Gasket OD differs by 1.3 mm (Baldwin B488: 64 mm, Premium Guard PG4612: 62.74 mm).
Gasket ID differs by 1.3 mm (Baldwin B488: 54.1 mm, Premium Guard PG4612: 55.37 mm).
Baldwin B488 is 6.1 mm taller (Baldwin B488: 82.6 mm, Premium Guard PG4612: 76.45 mm) -- check clearance before substituting.
Can OD differs by 28.2 mm (Baldwin B488: 93.7 mm, Premium Guard PG4612: 65.53 mm).
Both open their bypass valve in a comparable range: Baldwin B488 at 20-20 psi, Premium Guard PG4612 at 17-17 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.