Does running the air conditioning with the car idling consume more fuel?

[LeGianna]

Running the air conditioning with the car idling does consume more fuel. When the car is idling without moving, it means the engine is in an idle state. Turning on the air conditioning's cooling function while idling will increase fuel consumption and also lead to more carbon deposits accumulating in the engine. Therefore, running the air conditioning while the car is idling not only consumes more fuel but also has adverse effects on the engine. Here are some precautions for using the car air conditioning: 1. Adjusting the air direction randomly: Randomly adjusting the air direction can affect the interior temperature. If the airflow is directed toward high-temperature components that don't need cooling, it will counteract the cooling effect and fail to provide proper cooling. 2. Keeping the recirculation mode on for too long: Many drivers keep the recirculation mode on to save energy, which does reduce the compressor's workload and fuel consumption. However, prolonged use can make the air inside the car stale, reduce oxygen levels, and cause dizziness or even hypoxia for passengers. 3. Avoid running the air conditioning while parked: Running the air conditioning while parked is dangerous because, during idling or low-speed driving, gasoline may not burn completely, producing carbon monoxide. If the air conditioning is in fresh air mode, it will draw carbon monoxide into the car, potentially leading to carbon monoxide poisoning. This is especially risky during traffic jams when the air intake may face the exhaust of the vehicle in front. Therefore, it's best to switch to recirculation mode in heavy traffic.

[LeGeorge]

As someone who frequently commutes by car, I've noticed that using the air conditioning does increase fuel consumption, especially during hot summer days, and this effect is particularly noticeable. The air conditioning system requires some power from the engine to operate the compressor, which makes the engine work harder and naturally consumes more fuel. Generally, using the AC in city driving might increase fuel costs by 10% to 20%, but the impact is less significant on highways. If you want to save some fuel, you can try opening the windows for ventilation during low-speed driving or pre-cooling the car, such as parking in the shade to let the car breathe. These small tips can help reduce unnecessary fuel consumption while ensuring you don't have to endure excessive heat inside the car. The air conditioner is a convenient tool, but don't sacrifice comfort just to save money—safety comes first. Just set a comfortable temperature while driving.

[RyderLynn]

From a technical perspective, turning on the air conditioning when starting the car will definitely increase fuel consumption due to mechanical principles. The air conditioning compressor is driven by the engine belt, and once activated, it increases the engine load, leading to reduced combustion efficiency. On average, this can result in an additional 0.5 to 1 liter of fuel consumption per 100 kilometers. This effect is more noticeable in older car models or those with large-displacement engines. If the weather isn't extremely hot, I would recommend reducing the air conditioning power or using the recirculation mode, which can slightly lower fuel consumption without compromising cabin comfort. Additionally, frequently turning the air conditioning on and off is also detrimental to fuel efficiency—maintaining a stable temperature is better than random adjustments. In the long run, maintaining the air conditioning system, such as regularly cleaning the filters, can improve efficiency. Overall, the increased fuel consumption is a reasonable trade-off for an enhanced driving experience.

[OEmma]

As a budget-conscious family driver, fuel consumption when using air conditioning is truly worth noting. Every summer when I turn on the AC, the fuel gauge drops noticeably faster – at least 10% more fuel consumption, adding up to dozens of yuan in extra monthly fuel costs. Therefore, I now only use AC when absolutely necessary, such as when temperatures exceed 30°C, otherwise I roll down windows or use seat ventilation. After starting the car, I first activate external circulation to expel hot air, then switch back to internal circulation once cooled – an economical and practical approach. Additionally, planning routes wisely can reduce AC usage, like avoiding congested roads during peak hours. While AC is a necessary comfort, the accumulated savings and long-term maintenance costs do add up significantly.