Does the engine oil have any effect on the car?

The influence of engine oil quality on the vehicle is: 1, and the power decreases; 2. Increased fuel consumption; 3. Destruction of three-way catalysis. The function of engine oil is: 1, separating the surfaces of parts that slide relatively, thus reducing wear; 2. Bring the heat back to the oil tank and radiate it into the air to help the water tank cool the engine; 3. Recover the carbide, sludge and worn gold particles on the engine parts into the oil tank, and wash away the dirt generated on the working surface of the parts through the flow of lubricating oil. The characteristics of oil change are: 1, check the viscosity of the oil, and change the oil if there is no viscosity; 2. The color of engine oil is black; 3. There are too many black particles, metal chips and carbon deposits in the engine oil; 4. The smell of engine oil is wrong.