Why is the car consuming too much fuel?

[Opal]

There are four main reasons for excessive fuel consumption in cars: 1. Excessive carbon deposits in the engine: The primary cause of rapid carbon buildup in the engine in the short term is the use of inappropriate fuel. This situation is more likely to occur after long-distance driving or lending the vehicle to others. 2. Damaged oxygen sensor: As an internal control unit of the car, the oxygen sensor mainly monitors the air-fuel ratio of the engine. Once damaged, it will cause an imbalance in the air-fuel ratio, leading to a sudden increase in fuel consumption. 3. Long overdue replacement of the "three filters": During vehicle use, the three filters (oil filter, air filter, and fuel filter) must be replaced regularly. If not replaced for a long time, they will become dirty and affect performance, sending incorrect information to the engine control unit, resulting in incomplete fuel combustion and increased engine carbon deposits. 4. Issues with the engine's electronic control unit: This will directly cause difficulties in starting the vehicle, increased fuel consumption, poor power performance, and thick black exhaust emissions.