Data quality · fresh-used-delta
VOA/UOA Delta
Compares one fresh- and used-oil property and reports relative change.
Where to use
Compares one fresh- and used-oil property and reports relative change.
Methodology
Normalizes submitted data, calculates derived indicators and applies transparent warning rules.
Console version
FreshUsedDelta.exe input.csv output.json
CSV header: used_value,fresh_value,warning_pct
Limitations
This screening result does not replace manufacturer requirements, an accredited laboratory report or engineering diagnostics. Limits must be configured for the engine, lubricant, method and asset history.