TBN 5 : Total Base Number. ASTM D2896. This is measured in mg. KOH needed to neutralize an acidic solution through a reverse titration. TBN is the ability of the product to neutralize acid
EESiFlo North America, Terminology and Glossary: Fuel and Oil Terms, Pennsylvania, USA 2002. flowmeterdirectory.com/flowmeter_terminology, (Oil - Amer) {564}