Why is the van consuming too much fuel?

[DeJaxson]

There are several reasons why a van may be particularly fuel-consuming: 1. Excessive carbon deposits in the engine: The main reason for excessive carbon deposits in the engine in the short term is the use of inappropriate fuel. 2. Long-term neglect of the 'three filters': During vehicle use, the three filters (oil filter, air filter, and fuel filter) must be replaced regularly. If they are not replaced for a long time, it will affect performance, send incorrect information to the engine control unit, lead to incomplete fuel combustion, and increase engine carbon deposits. 3. Damage to the vehicle's oxygen sensor: Once the oxygen sensor is damaged, it will cause an imbalance in the engine's fuel-air mixture ratio, and fuel consumption will definitely increase suddenly.