NOVELTY - A methanol fuel oil comprises 10-50 %mass methanol, 30-75 %mass No. 0 diesel oil, 1-10 %mass oleic acid amide, 1-10 %mass methyleneammonium salt, 0.5-5 %mass antioxidant, 1-10 %mass thiadiazole derivative, 1-10 %mass pentaerythritol ester, 0.5-15 %mass phthalate, 1-15 %mass unsaturated fatty acid soap, 5-35 %mass low-carbon fatty alcohol, 1-5 %mass cosolvent, 1-10 %mass naphthenate, 1-10 %mass cetane-number improver, and 1-15 %mass combustion improver.    USE - Methanol fuel oil is used for ship.    ADVANTAGE - The methanol fuel oil uses reduced amount of diesel oil, effectively reduces carbon discharge and swelling of rubber, does not corrode engines, and meets national standards.    DETAILED DESCRIPTION - A methanol fuel oil comprises 10-50 %mass, preferably 10-40 %mass methanol, 30-75 %mass, preferably 50-70 %mass No. 0 diesel oil, 1-10 %mass, preferably 1-6 %mass oleic acid amide, 1-10 %mass, preferably 1-5 %mass methyleneammonium salt, 0.5-5 %mass antioxidant, 1-10 %mass, preferably 1-6 %mass thiadiazole derivative, 1-10 %mass, preferably 2-6 %mass pentaerythritol ester, 0.5-15 %mass, preferably 0.5-10 %mass phthalate, 1-15 %mass, preferably 1-10 %mass unsaturated fatty acid soap, 5-35 %mass, preferably 5-25 %mass low-carbon fatty alcohol, 1-5 %mass cosolvent, 1-10 %mass, preferably 1-4 %mass naphthenate, 1-10 %mass, preferably 1-6 %mass cetane-number improver, and 1-15 %mass, preferably 3-10 %mass combustion improver. The cosolvent is Tween-80 (RTM: polyoxyethylene (20) sorbitan monooleate), Tween-60 (RTM: polyethylene glycol-20 sorbitan monostearate), Tween-20 (RTM: polyethylene glycol(20)sorbitan monolaurate), sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, Peregal (RTM: nonylphenyl polyoxyethylene ether), Span-80 (RTM: sorbitan monooleate), Span-60 (RTM: sorbitan monostearate), Span-50, TX-10, AE09, laurylamine oxide, benzyl ammonium chloride, and/or cetylbenzylammonium chloride. The combustion improver is methylal, ferrocene, sodium percarbonate, sodium perborate, aluminum peroxide, zinc peroxide, and/or nickel peroxide. An INDEPENDENT CLAIM is included for preparation of methanol fuel oil, which involves adding all components except diesel oil to a stainless steel reactor, stirring and homogenizing until complete dissolution, adding diesel oil, homogenizing and stirring, and reacting to obtain a transparent liquid.