D2 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 GOST variant (Russia) for Gasoil is 305-82 specifying the sulphur content of 0.02% max. D6 is also known as Residual Fuel Oil and is of high-viscosity. This particular fuel oil requires preheating to 220 - 260 Degrees Fahrenheit. D6 is mostly used for generators. D6 is a type of residual fuel, mainly used in power plants and larger ships. Mazut is a heavy, low quality fuel oil, used in generating plants and similar applications. ... is manufactured to GOST specifications, and has four level of sulphur , very low sulfur M100, low sulfur M100 , normal and high sulphur. and range of 0.005 and 0.035 sulfur, ISO Standard.
