D6 Fuel Oil
D6 is also being 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.
M100 Fuel Oil
Fuel oil mazut 100 is supplied according to the Russian technical specification GOST 10585-99, section for fuel oil, mazut sort 100. This kind of oil is graded as the heavy furnace oil.