WIX 51085 vs Baldwin BT5: Oil Filter Compatibility
Compare WIX 51085 and Baldwin BT5 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 -2.6 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.
WIX 51085 and Baldwin BT5 specifications
How matching is scored| Specification | WIX 51085 | Baldwin BT5 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 71.98 mm | 71.4 mm |
| Gasket ID | 62.53 mm | 62.7 mm |
| Can OD | 93 mm | 108 mm |
| Height | 97.43 mm | 100 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 8 - 11 | 8 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.6 mm (WIX 51085: 71.98 mm, Baldwin BT5: 71.4 mm).
Gasket ID differs by 0.2 mm (WIX 51085: 62.53 mm, Baldwin BT5: 62.7 mm).
Baldwin BT5 is 2.6 mm taller (WIX 51085: 97.43 mm, Baldwin BT5: 100 mm) -- check clearance before substituting.
Can OD differs by 15 mm (WIX 51085: 93 mm, Baldwin BT5: 108 mm).
Both open their bypass valve in a comparable range: WIX 51085 at 8-11 psi, Baldwin BT5 at 8-8 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.