Why is the fuel consumption of the new Buick Excelle getting higher and higher?

[StEvan]

New Buick Excelle's fuel consumption is getting higher and higher, possibly due to insufficient tire pressure, faulty ignition coils, poor fuel injector atomization, or oxygen sensor failure. Insufficient tire pressure: This increases the contact area between the tires and the ground, leading to greater friction and driving resistance, which in turn raises fuel consumption. Faulty ignition coils: If the ignition coils are faulty, some cylinders may not operate, reducing power. However, fuel is still injected as usual but without any effect, thus increasing fuel consumption. Poor fuel injector atomization: This can be caused by a faulty fuel pressure regulator leading to excessively high fuel pressure, or excessive engine carbon deposits absorbing part of the injected gasoline. Oxygen sensor failure: This can cause fuel trim to fail, with the computer continuously sending fuel injection signals. A faulty air flow meter can also result in incorrect intake data.