Filter style
Spin-on filters are compared differently from cartridge filters. A match must make sense for the physical filter style before the rest of the comparison is useful.
How Filter-Match scores oil filter compatibility
Filter-Match uses a proprietary compatibility model that compares physical dimensions and functional oil-filter features. The exact scoring formula, weighting, tolerance rules, cutoff thresholds, and data source hierarchy are proprietary. The comparison notes shown on the site summarize the major factors considered so users can understand what to verify before installing a substitute.
A match result is a research aid, not a guarantee of fitment. Always verify the filter against the application, service manual, and the physical mounting surface before installation.
Thread or cartridge fit
For spin-on filters, thread compatibility is a primary requirement. For cartridge filters, the relevant inner diameters, end geometry, and height are reviewed instead.
Gasket and sealing dimensions
The sealing gasket must land safely on the mounting surface. Outside diameter and inside diameter differences are treated conservatively because a poor seal can cause leakage or loss of oil pressure.
Can size and clearance
Height and outside diameter are compared so users can spot possible clearance issues. A longer or wider filter can still be a bad substitute even when the threaded end appears compatible.
Bypass and anti-drainback behavior
Internal bypass valves, bypass pressure ranges, and anti-drainback valves are considered because they can affect cold starts, oil flow, and drain-back behavior in real applications.
Source-data consistency
When available data conflicts or is incomplete, the result is treated with lower confidence. Unknown values are not treated the same as confirmed matching values.
What the public score means
Higher scores generally mean the compared filters align more closely across the visible compatibility factors. Lower scores or caution labels mean there are known differences, missing data, or conditions that deserve extra verification.