Used oil analysis · viscosity-retention
Viscosity Retention
Compares used- and fresh-oil viscosity to screen shear loss, thickening or dilution.
Where to use
Compares used- and fresh-oil viscosity to screen shear loss, thickening or dilution.
Methodology
Normalizes submitted data, calculates derived indicators and applies transparent warning rules.
Standards context
Console version
ViscosityRetention.exe input.csv output.json
CSV header: used_viscosity,fresh_viscosity,allowed_deviation
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.