Clarified Oil is a lower viscosity, catalytic cracked clarified oil manufactured to meet the viscosity specifications desired. Heavy residual fuels / oils are complex mixtures of relatively high molecular weight compounds. The typical molecular weight range of the Slurry Oil is about 250 to 1000.

Compound types include asphaltenes. polar aromatics, napthene-aromatics, saturated hydrocarbons and heteromolecules containing sulfur, oxygen, nitrogen and metals. Slurry Oil contains some high molecular weight olefins and mixed aromatic-olefins. These cracked stocks contain greater proportions of highly condensed aromatics and fewer mixed aromatics and nonaromatic cycloparraffinic compounds than straight run stocks.