Diesel Gasoil (D2) is a group of petroleum distillation products having boiling points between Kerosene and Lubricating Oil. The term originally referred to the product of oil gas works that was added to the product of coal gas works to produce improved illuminating gas. Small molecules like those in Propane, Naphtha, Gasoline for cars, and Jet Fuel have relatively low boiling points, and they are removed at the start of the fractional distillation process.

Diesel Gasoil (D2) is an abbreviation for Gas oil. It is the second distillate from the processing of crude oil. It can be used without reformers and additives. D2 has helped in a major reduction of wasted energy, pollution and waste.

Diesel Gasoil (D2) is any liquid fuel used in diesel engines, whose fuel ignition takes place without any spark, as a result of compression of the inlet air mixture and then injection of fuel.

Truckers use Diesel #2 to carry heavy loads for long distances at sustained speeds because its less volatile than Diesel #1 and provides greater fuel economy. Diesel fuel also is measured by its viscosity. Diesel #1 flows more easily than Diesel #2, so its more efficient at lower temperatures. 

It is a heavy oil and it is created  by a process of fractional distillation of petroleum. It is used as a fuel for automotive applications and in heating. Diesel engines are used worldwide due to higher thermodynamic efficiency and thus fuel efficiently. Gas oil, which is used in offroad vehicles is often called red diesel. Heavier petroleum products like diesel fuel and lubricating oil are much less volatile and distill out more slowly, while bunker oil is literally the bottom of the barrel; in oil distilling, the only things denser than bunker fuel are carbon black feedstock and bituminous residue (Asphalt), which is used for paving roads and sealing roofs.

The ****2 version of D2 has a lower sulphur content. The GOST ****2 variant of Gas oil and D2 meets the ISO industry standards with a suplhur content of 0.2% maximum. This low sulphur content refers to Ultra Low Sulphur Fuel. D2 Oil GOST ****2 also creates less pollution. Since ***6, nearly all of the petroleumbased diesel fuels available in North America and Europe have been of a ULSD type.