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What is the approximate fuel consumption of a 1.5t engine idling with AC on for one hour?

4 Answers
SamuelAnn
07/29/25 11:02pm
1.5t idling with AC on for one hour consumes approximately 1L of fuel. Here are some fuel-saving methods: 1. Maintain good vehicle condition: Ensure the vehicle is tuned to optimal performance and change engine oil promptly. Also, maintain proper tire pressure. A well-maintained car requires less effort and improves fuel efficiency. 2. Close windows on highways: Open windows increase drag resistance, which can add an extra 10% to fuel consumption. 3. Shift gears properly: Driving at high speeds in low gear can increase fuel consumption by 45% compared to using the correct gear. 4. Reduce excess weight: Unnecessary items in the car all contribute to increased fuel consumption.
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DiRuth
08/16/25 12:55am
I often enjoy studying car mechanics. A 1.5T engine idling with the AC on for about an hour typically consumes between 1.0 to 1.3 liters of fuel, depending on the engine design and AC usage intensity. When the AC is on, the compressor consumes power, adding extra load and increasing fuel consumption by 20%-30% compared to pure idling. In summer, high temperatures lead to even higher fuel consumption, possibly up to 1.5 liters, due to the fan running at high speeds. In winter, the AC heating consumes slightly less. Prolonged idling like this can lead to carbon buildup, causing engine vibrations and wear. It's advisable to avoid long periods of idling while parked and use apps to monitor real-time data. To save fuel, consider models with start-stop systems or regularly maintain the AC filter. Overall, estimating around 1.2 liters as a reference, this translates to roughly 10 yuan in fuel costs, but small amounts add up to significant waste over time.
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SanJordan
10/18/25 6:24am
I've been driving for many years and often turn on the AC while waiting in the car. A 1.5T engine consumes approximately 1.1 liters of fuel per hour at idle, with actual measurements reaching up to 1.3 liters in summer. At the current fuel price of 8 yuan per liter, this costs nearly 9 yuan. In winter, using the heater consumes slightly less fuel, around 0.9 liters. I usually avoid doing this because it not only wastes money but also increases noise and exhaust emissions. If the weather is nice, I turn off the engine and open the windows or park in the shade. Based on experience, such habits can waste hundreds of yuan in fuel annually—better to invest in upgraded ventilation cushions. Fellow car enthusiasts agree that controlling idle time is most effective, and getting out to walk is also healthier.
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VonAlina
12/01/25 7:02am
I'm now carefully budgeting my living expenses. A 1.5T engine idling with AC on consumes 1.0 to 1.2 liters of fuel per hour, which equals about 8-10 yuan in fuel costs. This is not a small amount - doing it weekly would add up to an extra simple meal. I set phone reminders to avoid overtime usage or use fans instead of AC. Opening windows for ventilation during spring and autumn can also save fuel. Regular cleaning of the AC system improves efficiency and reduces extra consumption. From a cost-saving perspective, developing good habits is important, as small savings accumulate to significant results. Additionally, parking in shaded areas and turning off the engine helps maintain temporary comfort as the car interior cools down.
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