Fuel Oil is a fraction obtained from petroleum distillation, either as a distillate or a residue. Broadly speaking, Oil is any liquid petroleum product, which is burned in a furnace or boiler for the generation of heat or used in an engine for the generation of power, except oils having a flash point of approximately 40 oC (104 o F). Oil is made of long hydrocarbon chains, particularly alkanes, cycloalkanes and aromatics. The term Fuel Oil is also used in a stricter sense to refer only to the heaviest commercial fuel that can be obtained from crude oil, heavier than gasoline and naphtha. Fuel oil with following specification is available: “CST 180″ and “CST 230″ Viscosity kinematic 50 ° C (max) 180 230 Pour point (max) ° C 5.0 15.0 Flash point (min) ° C 63 63 Sulphur Total (max) %mass 3.0 3.0 Carbon Residue Conradson (max)%mass 13 13 Ash (max) %mass 0.05 0.05 Water & sediment (max) %vol 0.5 0.5 Colorific value higher (min) MJ/kg 42.2 42.2