FRAM HP1 vs WIX 51515: Oil Filter Compatibility
Compare FRAM HP1 and WIX 51515 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 HP1 and WIX 51515 specifications
How matching is scored| Specification | FRAM HP1 | WIX 51515 |
|---|---|---|
| Thread size | 3/4"-16 | 3/4-16 |
| Gasket OD | 71 mm | 71.8 mm |
| Gasket ID | 61 mm | 62.5 mm |
| Can OD | 95 mm | 92.99 mm |
| Height | 143 mm | 132 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 22 | 8 - 11 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.8 mm (FRAM HP1: 71 mm, WIX 51515: 71.8 mm).
Gasket ID differs by 1.5 mm (FRAM HP1: 61 mm, WIX 51515: 62.5 mm).
FRAM HP1 is 11 mm taller (FRAM HP1: 143 mm, WIX 51515: 132 mm) -- check clearance before substituting.
Can OD differs by 2 mm (FRAM HP1: 95 mm, WIX 51515: 92.99 mm).
Both open their bypass valve in a comparable range: FRAM HP1 at 22-22 psi, WIX 51515 at 8-11 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.