Residue (test results): Kinematic viscosity (100 ℃)> 500; Engler viscosity (100 ℃))> 100; flash point (50 ℃): 158; sulfur content,% (m / m): 0.79; moisture, % (m / m): traces; ash,% (m / m): 0.08; mechanical impurities,% (m / m): 0.65; density kg/cm3: 0.978; carbon residue,% (m / m): 17.78