Fuel oil is heavier than petroleum and naphtha and is a fraction obtained from petroleum distillation, either as a distillate or a residue.
Any liquid petroleum product that is burnt 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 42 degrees, can be termed as Fuel Oil.
The burning of fuel oils releases gases whose pressure can be used to drive engines and gas turbines. Due to the fact that marine engines are designed to use different viscosities of fuel, the unit of viscosity, the centistoke (cSt), is used to describe various grades. The two grades of Fuel oil we usually trade in are IFO 180 cSt and IFO 380 cSt.
FUEL OIL GRADES
IFO 180 cSt : It is a mix of 98% residual oil and 2% distillate oil.
IFO 380 cSt : It is a mix of 88% residual oil and 12% distillate oil. Due to the higher content in distillate oil, IFO 380 is more expensive than IFO 180.