The choice of distribution lubricants should be selected according to the requirements of the engine. It is not possible to use too advanced oil on lower-demand engines or lower-grade oils on higher-demand engines. The choice of the distribution of lubricants can be upgraded to the level recommended by the manufacturer, or the performance of synthetic engine oil is better. Try to choose winter and summer general purpose oil. General purpose oil maintains stable lubrication performance regardless of temperature, and provides better protection for the engine. The hazards of excessive engine oil distribution are well known, so some owners are afraid of lack of oil and burned tiles, and the number of fuels to be filled often exceeds the standard. There are many hazards in sending too much lubricant: 1. Crankshaft agitation causes the oil to form a large number of bubbles and deteriorates, increasing the crankshaft resistance, which not only increases engine fuel consumption, but also reduces engine power. 2. As the oil rushes to the combustion chamber along the cylinder wall, it causes “burning oil”, which increases the consumption of oil and deteriorates the emissions. 3. Accelerate the formation of carbon deposits in the combustion chamber, making the engine susceptible to deflagration.