Marine fuel oil: Density (20 ℃), kg/m3842.3; kinematic viscosity, mm2 / s, 40 ℃ less than 3.187; flash point (closed), ℃ no less than 76; Pour Point, ℃ not more than -3; sulfur (mass fraction) is not greater than 0.18%; cetane index of not less than 52; residual carbon (mass fraction) is not greater than 0.01%; ash (wt)% ≤ 0.002; mechanical impurities (mass fraction) is not greater than 0.02%; moisture (wt)% not more than traces