What are the symptoms of using counterfeit engine oil?

1 Answers
Karen
07/30/25 8:50am
The symptoms of using counterfeit engine oil are: gums and incompletely burned substances can accumulate on the valves, intake passages, and combustion chambers, affecting the engine's operation and causing engine damage. The functions of engine oil are: 1. To separate the surfaces of relatively sliding parts, thereby reducing wear; 2. To carry heat back to the oil tank and then dissipate it into the air to help the radiator cool the engine; 3. To circulate carbon deposits, sludge, and worn metal particles from engine parts back to the oil tank, flushing away dirt generated on the working surfaces of parts through the flow of the lubricating oil. The characteristics indicating the need for an oil change are: 1. Check the viscosity of the oil—if there is no viscosity, the oil needs to be changed; 2. The color of the oil turns black; 3. Excessive black particles, metal shavings, or carbon deposits in the oil.
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