The fractional distillation of crude oil yields a vast array of refined derivatives, among which five primary classes stand out due to their massive global consumption and economic importance. These key categories include light distillates like liquefied petroleum gas and gasoline utilized for internal combustion engines; middle distillates encompassing kerosene, jet fuel, and automotive diesel; heavy distillates and gas oils used for industrial heating and commercial transport; residual fuel oils utilized in heavy manufacturing and maritime shipping; and non-fuel solid or semisolid products like petroleum asphalt, paraffin wax, and lubricating greases.