What Does a Clean Exhaust Pipe Indicate?
1 Answers
A clean exhaust pipe indicates that the car has been driven very little, or that the combustion inside the engine is very efficient. Additional information: Reasons for a blackened exhaust pipe: The exhaust pipe turns black because some of the exhaust gases contain unburned fuel mixture, which over time causes the pipe to blacken. A blackened exhaust pipe is normal and should not be used to judge the engine's working condition. Measures to reduce exhaust pipe blackening: To keep the engine in good condition, regular maintenance is essential. Use high-quality gasoline with the correct octane rating. Prolonged use of low-quality gasoline can lead to increased carbon deposits in the engine, which may cause knocking. Knocking reduces engine power and increases fuel consumption. Knocking is an abnormal combustion phenomenon in the engine. During the compression stroke, the piston moves upward to compress the fuel-air mixture, causing its temperature and pressure to rise.