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Degradation · tbn-tan-margin

TBN-to-TAN Reserve Margin

Shows the difference between remaining TBN and TAN as a transparent reserve indicator.

Where to use

Shows the difference between remaining TBN and TAN as a transparent reserve indicator.

Methodology

Uses only submitted measurements and transparent deterministic formulas/rules. No model training or hidden ML logic is used.

Standards context

ASTM D2896 ASTM D4739 ASTM D664

Console version

TbnTanMargin.exe input.csv output.json

CSV header: used_tbn,used_tan

Limitations

The result is an engineering screen. Interpret it with the fresh-fluid baseline, laboratory method, OEM requirements and the asset-specific trend.