Ordinary lubricating oil products become thicker at low temperature, the fluidity is weakened, and the time to reach the lubrication parts is longer, which makes the vehicle difficult to start and the wear is increased, which is very unfavorable to the engine. When to change the engine oil of automatic concrete mixer and what type of engine oil to choose? Xiaobian reminds you of four points to pay attention to:

1. 尽量选择冬夏通用的机油，通用机油无论温度怎么变化，都能保持比较稳定的润滑性能，对发动机能够起到较好的保护作用。

1. Try to choose the general engine oil in winter and summer. No matter how the temperature changes, the general engine oil can maintain a relatively stable lubrication performance, which can play a better role in protecting the engine.

2. 要根据发动机的要求选择润滑油，既不能在要求较低的发动机适用过于较好的机油，也不能将低级的机油使用在要求较高的发动机上，总之，发动机的机油选择要恰当。

2. The lubricating oil should be selected according to the requirements of the engine. Neither too good engine oil should be applied to the engine with lower requirements, nor low-grade engine oil should be used to the engine with higher requirements. In a word, the engine oil selection should be appropriate.
               

3. 自动混凝土搅拌车要根据发动机的状况来选择，如果发动机是新的或者状况良好的，要尽可能选用粘度较低的机油，从而保证润滑油的流动畅通无阻，有效减少启动时的磨损。

3. The automatic concrete mixer should be selected according to the condition of the engine. If the engine is new or in good condition, the engine oil with lower viscosity should be selected as far as possible, so as to ensure the smooth flow of lubricating oil and effectively reduce the wear during starting.

4. 如果在高温季节或发动机已经磨损到一定程度，就要选用高粘度的机油，这样才能有利于形成较厚的油膜，维持机油的压力，并减少机油消耗。

4. If the engine has been worn to a certain extent in the high temperature season, it is necessary to choose high viscosity oil, which is conducive to the formation of a thicker oil film, maintaining the oil pressure and reducing oil consumption.

5.机油的添加量不能过多，机油添加量并不是越多越好，如果润滑油过多，就会增加曲轴的转动阻力，降低发动机的输出功率，并且哪些过量的机油会窜入燃烧室燃烧，造成车辆烧机油，冒蓝烟，以于油耗增加。所以在添加机油的时候，一定要略低于机油尺以高刻度为宜；此外还要掌握机油的型号、换油的季节、发动机的性能等诸多因素。

5. The amount of oil should not be too much. The more the oil is added, the better. If there is too much lubricating oil, it will increase the rotation resistance of the crankshaft and reduce the output power of the engine. What excess oil will rush into the combustion chamber and cause the vehicle to burn oil and emit blue smoke, so that the fuel consumption will increase. Therefore, when adding engine oil, it must be slightly lower than the oil dipstick, and the high scale is appropriate; in addition, it is necessary to master many factors, such as the type of engine oil, the season of oil change, the performance of the engine, etc.