FRAM HPH3600 vs NAPA Gold 1525: Oil Filter Compatibility
Compare FRAM HPH3600 and NAPA Gold 1525 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
Closest known dimensional difference: height -23.7 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.
FRAM HPH3600 and NAPA Gold 1525 specifications
How matching is scored| Specification | FRAM HPH3600 | NAPA Gold 1525 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 71.1 mm | 72 mm |
| Gasket ID | 62.5 mm | 63 mm |
| Can OD | 74.7 mm | 74.9 mm |
| Height | 124.7 mm | 148.4 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 | 13 - 19 |
| 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 HPH3600: 71.1 mm, NAPA Gold 1525: 72 mm).
Gasket ID differs by 0.5 mm (FRAM HPH3600: 62.5 mm, NAPA Gold 1525: 63 mm).
NAPA Gold 1525 is 23.7 mm taller (FRAM HPH3600: 124.7 mm, NAPA Gold 1525: 148.4 mm) -- check clearance before substituting.
Can OD differs by 0.2 mm (FRAM HPH3600: 74.7 mm, NAPA Gold 1525: 74.9 mm).
Both open their bypass valve in a comparable range: FRAM HPH3600 at 12-12 psi, NAPA Gold 1525 at 13-19 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.