What are the main reasons for the deterioration of car power performance?

[VonIsla]

Main reasons for the deterioration of car power performance: 1. Engine failure; 2. Lack of regular maintenance leading to aging of components; 3. Use of poor-quality gasoline during refueling, resulting in reduced power; 4. Blockage of the fuel tank vent hole, fuel tank switch, fuel filter, or fuel lines between the tank and carburetor, preventing adequate fuel supply; 5. Incorrect ignition timing, causing premature ignition of the air-fuel mixture and knocking. Car power performance refers to the average driving speed achievable by a car moving straight on a good road surface, determined by the longitudinal external forces acting on the car.