Why is the fuel consumption of Geely Boyue getting higher and higher?

[OAniyah]

There are generally several reasons for a sudden increase in fuel consumption: 1. Severe carbon deposits and poor fuel quality, or frequent use of fuel additives, can lead to increased carbon buildup inside the engine. Excessive carbon deposits can make the intake manifold rough, affecting the air intake and the mixture effect. If you notice increased fuel consumption along with reduced power and acceleration vibrations, it may indicate excessive carbon deposits that need cleaning. 2. The ignition system, including the ignition coil and spark plugs, is one of the common sources of faults. A faulty ignition coil can cause the ignition system to malfunction, resulting in cylinder misfires, reduced power, and increased fuel consumption. Spark plugs are also wear-and-tear parts; prolonged use without replacement can degrade ignition performance, leading to incomplete fuel combustion. Therefore, spark plugs should be replaced regularly. 3. Maintenance issues such as too much or too little engine oil, poor-quality oil, excessive viscosity, or not changing the oil on time are critical factors affecting engine performance. Always use high-quality oil that meets your vehicle's specifications and change it on schedule. Additionally, a dirty air filter can clog the intake tract, increasing intake resistance, reducing power, and increasing fuel consumption. 4. The oxygen sensor, located in the vehicle's exhaust pipe, is a ceramic component that detects and controls the oxygen-to-fuel ratio. The oxygen sensor monitors exhaust gases to regulate the fuel injection system. If the oxygen sensor fails, it can affect the fuel supply, causing a significant rise in fuel consumption. In such cases, it's necessary to check whether the oxygen sensor is damaged.