Failure to replace engine oil on time will also result in excess sludge. Sludge is generally due to high-pressure unburned gases in the combustion chamber, acid, moisture, sulfur, and nitrogen oxides entering the oil in the crankcase through the gap between the piston ring and the cylinder wall, and then mixed with the metal powder produced by the wear of the parts. Together, slowly accumulate, and then formed sludge.
The oil is not replaced on time, and the most serious consequence is the wear of various mechanical parts of the engine, such as pistons and cylinders. Once there is a problem with the piston and the cylinder, the machine needs to be overhauled, and overhaul is something that each owner would not like to see.
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