Lube TBN - Depletion Rate

Cylinder-oil TBN depletion rate based on fuel sulphur content and feed rate - the basis for selecting 40/70/100/140 BN grades.

TBNLubeChemistry

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

BN_{req} = \frac{m_S \cdot 2 \cdot M_{KOH}}{M_S \cdot \dot m_{oil}}

Symbol	Meaning	Unit
$m_S$	Sulphur mass per kWh	g/kWh
$\dot m_{oil}$	Cylinder-oil feed rate	g/kWh

Source: ExxonMobil Mobilgard Bulletin - TBN

Cylinder-oil TBN depletion rate based on fuel sulphur content and feed rate - the basis for selecting 40/70/100/140 BN grades.