1, the latent heat of vaporization of methanol is high, easy to cause the low-temperature starting performance of methanol fuel is poor, the winter need to take appropriate measures;

2, methanol and gasoline mixing to form a **** boiler, in the methanol 15% ratio near the methanol gasoline vapour pressure increased significantly, when the ambient air temperature is high methanol gasoline is easy to form a gas block in the oil circuit, resulting in the automobile fuel supply is poor;

3, incomplete combustion of methanol is easy to form unconventional pollutant emissions, including formaldehyde emissions are higher than conventional gasoline emissions, which can cause poisoning of the automobile three-way catalytic converter;

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3, methanol incomplete combustion is easy to form non-conventional pollution emissions, including formaldehyde emissions than conventional gasoline vehicle emissions are high, easy to cause automotive poisoning of the three-way catalytic converter;

4, methanol is corrosive, the rubber has a swelling effect, so methanol gasoline is often added to anti-corrosion, anti-swelling additives;

5, methanol is a good solvent, into the cylinder will destroy the cylinder wall Oil film, easy to cause the cylinder wall - piston ring friction vice abnormal wear;

6, methanol incomplete combustion products contain acidic substances, easy to cause premature acidification of engine lubricating oil.