1. Why should the engine oil be changed on time
1) Engine oil has a shelf life, which will reduce its performance over time, resulting in accelerated wear of mechanical wear parts.
2) When the engine oil runs at high temperature, its physical and chemical properties will change, and its mechanical properties will also change.
3) If the engine runs for a long time, the impurities in the oil will increase, which will increase the wear speed of mechanical parts.
2. What are the serious consequences of not changing the engine oil on time
1) Failure to change the oil on time will lead to the fault of low oil pressure. The most direct consequence of low oil pressure is that it will cause semi dry friction or dry friction between various mating parts, and the engine will make obvious abnormal noise, which will also cause Bush burning in serious cases.
2) Failure to change the oil on time will also lead to the problem of high oil pressure. High oil pressure will lead to premature damage of gasoline filter and carbon deposition in engine cylinder. It will also reduce the service life of the engine.
3) Not changing the engine oil on time will also bring the problem of too much sludge. Sludge is generally due to the high-pressure unburned gas in the combustion chamber, acid, moisture, sulfur and nitrogen oxides enter the engine oil of the crankcase through the gap between the piston ring and the cylinder wall, and then mix with the metal powder produced by the wear of parts, slowly accumulate, and then form sludge.
4) The most serious consequence of not changing the oil on time is the wear of various mechanical parts of the engine, such as piston and cylinder barrel. Once there is a problem with the piston and cylinder barrel, the machine needs to be repaired, and repair is something that every owner doesn't want to see.
5) Failure to change the oil on time will result in high water temperature. If the engine oil is not changed on time, the oil storage will be too small, resulting in no or little oil in the lubrication system. At this time, all mechanical parts of the engine will be in the state of semi dry friction or dry friction. Semi dry friction or dry friction will produce a lot of heat, which makes the water temperature rise sharply.
