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Car Tips and Tricks

Does Air Conditioning Increase Fuel Consumption? Yes – But There Are Smarter Ways to Use It.

With warmer days on the way, you might be wondering: does using the air conditioning increase fuel consumption? The answer is yes – but it’s not that simple. There are several strategies that allow you to enjoy your car without giving up on comfort. Shall we explore them?

How Does Air Conditioning Affect Your Car’s Fuel Consumption?

Your car’s air conditioning system operates through a compressor powered by the engine. This means that whenever you turn on the AC, your engine needs to work harder – which in turn increases fuel consumption. Now’s a good time to find out which option is better for spring road trips: diesel or petrol?

Be aware that the impact on fuel consumption varies significantly depending on:
  • The type of vehicle (petrol, diesel, hybrid, or electric)
  • The power of the air conditioning system
  • Your driving style (city traffic, motorway, hills, etc.)

When Is Air Conditioning Most Likely to Increase Fuel Use?

There are certain situations where air conditioning has an even greater effect on fuel consumption:
  • In stop-start traffic or congestion: when the car is stationary or moving slowly, the engine is already under pressure – and the AC adds to that load.
  • When driving uphill or with a fully loaded car: the engine’s effort becomes even more noticeable.
  • In the first few minutes after starting the car: when the cabin is still very hot, the air conditioning system runs at full power to cool it quickly.
Child next to open car window

How to Use Air Conditioning Efficiently in Your Car

Want to stay comfortable without spending too much on fuel? Here are a few practical tips to keep enjoying your car’s air conditioning – without worrying too much about fuel costs:
  • Ventilate the car before turning on the AC: open the windows for a few seconds to let out the hot air.
  • Keep the filters clean: dirty filters make the system work harder.
  • Use the recirculation function: especially on hot days, it helps maintain cool air without pulling in warm air from outside.
  • Avoid very low temperatures: 21 to 23 °C is usually enough for a comfortable interior.
  • Turn off the AC when it's not needed: for short trips or milder days, air conditioning may not be necessary.

Does Opening the Windows Help Save Fuel?

It depends. In city driving at low speeds, opening the windows can be a valid alternative. However, on motorways, it’s not as effective – because aerodynamic drag increases with open windows, which leads to higher fuel consumption.

Woman leaning out of car window

Want to Save Fuel? Practise Conscious Driving.

The key to saving fuel lies in driving mindfully and making smart use of your car’s features. If you’ve chosen to drive a car subscription from Xtracars, you’re already at an advantage: regular maintenance is included – so your air conditioning system will always be in top condition.

Xtracars Vehicles with Automatic AC and Optimised Consumption

In our fleet to rent, you’ll find various models with automatic air conditioning – allowing you to adjust the temperature intelligently and efficiently. A few examples:
  • Toyota Corolla SW: versatile and comfortable, with balanced fuel economy (up to 15 km/l) even with AC on – ideal for long trips and family use.
  • Mercedes A-Class: a premium compact with efficient versions (up to 5.8 l/100 km) and standard automatic climate control – combining style with savings.
  • SEAT Arona: a nippy and economical urban SUV (up to 5.3 l/100 km), with AC available in all versions – perfect for the city or weekend escapes.
  • Nissan Qashqai: a family SUV with excellent efficiency, especially in hybrid versions, and automatic climate control – designed for comfort and cost-effectiveness.

Xtracars: The Monthly Car Subscription That Helps You Save

Xtracars is the smart choice for those seeking hassle-free mobility. Thanks to our flexible monthly car subscription service, you have access to a car whenever you need it – without the costs of buying, maintaining, or insuring it.

You save money every month by avoiding unexpected expenses – and gain the freedom to choose the model that best suits your lifestyle. Simple, affordable, and commitment-free. With Xtracars, driving becomes easier – and more accessible.


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