The solution: you should use lower viscosity of the oil when the temperatuer. And every engine shoule be equipped with preheating device, should preheat several times before ignion.
解决办法：在气温较低时，应使用粘稠度低一点的机油。还有就是每台发动机都配有预热装置，打火之前应多预热几次。
Park automobile on the flat and level road, and then start engine to preheat engine oil.
将车辆停放在平坦和水平路面上，然后起动发动机以预热机油。
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