The fuel tank cap switch of the Buick Excelle is located on the left side of the driver's seat. Pull the fuel filler cap switch upward to release the handle and open the fuel filler cap. To open the fuel filler cap, slowly turn the cap to the left. To close the fuel filler cap, turn it to the right until you hear a click, then close the fuel filler door. The fuel tank cap refers to the lockable cover on the fuel filler port of a car, usually located at the rear of the vehicle. You should refuel with the type of gasoline specified in the operation manual. Using higher-octane gasoline in a vehicle designed for lower-octane fuel may cause delayed combustion, while using lower-octane gasoline in a high-octane vehicle may cause engine knocking. During daily driving, it is necessary to pay attention to the remaining fuel level in the tank at all times. Generally, the fuel level is observed through the fuel gauge inside the car. If there are no other issues, the fuel level will be accurately reflected on the gauge. The fuel gauge typically has 5 to 6 segments. When there are only 2 segments left, it's time to refuel to avoid running out of gas midway. Try not to wait until the fuel warning light comes on before refueling. This is because the fuel pump is located inside the fuel tank and operates at a high temperature when continuously working. Being immersed in fuel helps cool it effectively. When the fuel warning light comes on, it indicates that the fuel level is below the fuel pump. Refueling only when the light is on will shorten the lifespan of the fuel pump. Having too little fuel or running out of fuel may also burn out the fuel pump. During actual refueling, the amount of fuel may exceed the marked capacity. This is because the fuel tank capacity marked by car manufacturers is from the bottom of the tank to the safe limit. There is still some space from the safe limit to the fuel filler port. This space ensures that the fuel inside the tank can expand when the temperature rises without overflowing. If fuel is added up to the filler port during refueling, the actual refueling amount will exceed the marked tank capacity. The fuel consumption of a car is directly related to five major factors: driving habits, the car itself, road conditions, natural wind, and environmental temperature. Specific factors that increase fuel consumption are as follows: Driving habits: Aggressive driving, such as sudden acceleration, frequent overtaking, and not releasing the throttle in advance when approaching a red light, will increase fuel consumption. The car itself: Cars with larger displacements consume more fuel than those with smaller displacements because larger displacements generally mean higher power, requiring more gasoline to burn and perform work. Heavier cars also consume more fuel because greater weight requires more driving torque. Road conditions: Driving on dirt roads, muddy roads, soft surfaces, or mountain roads increases resistance and fuel consumption. Natural wind: Driving against the wind or on windy days increases car resistance and fuel consumption. Low environmental temperature: When the engine block temperature is low, the gasoline injected during a cold start does not atomize easily, requiring more gasoline to be injected for combustion, thus increasing fuel consumption. At the same time, low temperatures cause the engine computer to control the engine to run at higher RPMs to warm up, which also increases fuel consumption. Precautions for car refueling: Do not blindly use high-octane gasoline. Some car models have specific requirements for fuel quality. Using gasoline with a lower octane rating than specified may cause engine knocking. However, blindly using gasoline with a higher octane rating than required is also incorrect. High-octane gasoline burns more slowly. If a low-compression engine uses high-octane gasoline, it not only wastes money but also causes slow ignition and prolonged combustion time, preventing energy from being fully converted into power, resulting in sluggish acceleration during driving. Therefore, when refueling, try to refer to the requirements in the car's manual to choose the appropriate gasoline.
