Diesel, also called Gasoil, is a fuel oil that is the second distillate derived from crude oil. D2 diesel products contain different levels of sulfur and require no reformers or additives to produce. The higher the cetane number, the more volatile the fuel.
Diesel fuel comes in two grades - Diesel-1(D1) or Diesel-2(D2). Diesel is fuel commonly used in diesel engines and is also known as AGO or Automotive Gas Oil.
