A general classification of refined petroleum products that includes distillate fuel oil and kerosene.
A term broadly applied to hydrocarbons in the so-called "middle range" of refinery distillation. Examples are light heating oil, diesel fuel, gas-oil and kerosene.
Products heavier than motor gasoline/naphtha and lighter than residual fuel oil. This range includes heating oil, diesel, kerosene, and jet kero.