Distillate fuel oil

Products of refinery distillation sometimes referred to as middle distillates; kerosene, diesel fuel, and home heating oil. No. 2 fuel oil is the most common of these products used for heating and in boilers.

A general classification for the petroleum fractions produced in conventional distillation operations. Included are products known as No. 1, No. 2, and No. 4 fuel oils and No. 1, No. 2, and No. 4 diesel fuels. Used primarily for space heating, on and off-highway diesel engine fuel (including railroad engine fuel and fuel for agricultural machinery), and electric power generation.