Why is the engine oil smoking?

1 Answers
LincolnLee
07/30/25 10:52am
There are three scenarios when adding engine oil causes the car to smoke. Below is a detailed explanation: Introduction: If the smoke is black, it indicates an overly rich air-fuel mixture leading to poor engine combustion. If the smoke is white, it could be due to a lack of coolant in the radiator, high temperatures causing a faulty cylinder head gasket seal, allowing coolant to enter the engine, or gasoline containing excessive water. If the smoke is blue, it signifies that the engine is burning oil, which suggests poor sealing of the pistons, piston rings, valve stems, or valve stem seals, leading to oil leakage and producing blue smoke. Solutions for car smoking: Inspect the engine block and cylinder head gasket for damage, and check the fuel tank for water contamination. Refer to the car's manual and strictly follow the manufacturer's guidelines for adding the correct grade of gasoline. Regularly inspect the aging of components such as the carburetor. Carburetor-equipped cars differ from fuel-injected vehicles and require frequent maintenance and adjustments. Check the cylinder wires every 30,000 kilometers and the spark plugs every 10,000 kilometers, replacing any faulty parts promptly. If abnormal oil consumption is detected, immediately take the car to a service station for inspection.
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