FRAM PH6811 vs Premium Guard PG4612: Oil Filter Compatibility
Compare FRAM PH6811 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.
FRAM PH6811 and Premium Guard PG4612 specifications
How matching is scored| Specification | FRAM PH6811 | Premium Guard PG4612 |
|---|---|---|
| Thread size | M20X1,5 | M20x1.5 |
| Gasket OD | 63 mm | 62.74 mm |
| Gasket ID | 57 mm | 55.37 mm |
| Can OD | 66 mm | 65.53 mm |
| Height | 90 mm | 76.45 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 14.504 | 17 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M20x1.5.
Gasket OD differs by 0.3 mm (FRAM PH6811: 63 mm, Premium Guard PG4612: 62.74 mm).
Gasket ID differs by 1.6 mm (FRAM PH6811: 57 mm, Premium Guard PG4612: 55.37 mm).
FRAM PH6811 is 13.5 mm taller (FRAM PH6811: 90 mm, Premium Guard PG4612: 76.45 mm) -- check clearance before substituting.
Can OD differs by 0.5 mm (FRAM PH6811: 66 mm, Premium Guard PG4612: 65.53 mm).
Both open their bypass valve in a comparable range: FRAM PH6811 at 14.504-14.504 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.