Why does the Qashqai's fuel consumption increase over time?

[VonHannah]

The reasons why the Qashqai's fuel consumption increases over time are as follows: Failure to perform regular maintenance: The vehicle may not have been serviced on time, and components such as the air filter, fuel filter, spark plugs, and clutch plates may not have been replaced, leading to higher fuel consumption. Carbon buildup in the control system: Carbon deposits and faults in the electronic control system, such as carbon buildup in the throttle body, idle valve, and fuel injectors, as well as signal malfunctions in the oxygen sensor and coolant temperature sensor, are also factors contributing to increased fuel consumption. Poor driving habits: Driving habits can also increase the vehicle's fuel consumption. Rapid acceleration, sudden braking, and mismatched speed and gear selection are among the reasons for higher fuel usage. Insufficient tire pressure: Insufficient or low tire pressure increases friction between the tires and the ground, resulting in greater resistance and higher fuel consumption. Severe tire wear can also lead to frequent slipping, further increasing fuel consumption.