Is Leaving the Car Running for a Day Harmful?

1 Answers
Edmund
07/30/25 12:08am
Leaving the car running for a day does not have a significant impact on the vehicle, but it does waste some fuel. Below is a detailed introduction to the potential harms of forgetting to turn off the engine: 1. Recommendation: It is advisable to develop the habit of turning off the engine immediately after parking, such as pressing the ignition button instinctively after shifting to P mode. If the engine is left running, the vehicle will remain in an idling state and continue to consume fuel, leading to higher fuel consumption compared to driving at an economical speed. 2. Other Harms: Leaving the engine running overnight will result in prolonged idling, which reduces the oil pump speed. At this point, the oil pressure is relatively low, making it difficult to effectively lubricate components such as the bearing bush. This can exacerbate wear and tear on the piston, connecting rod, and engine.
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