When the AC is set to around 22°C-24°C while driving and the fan speed is moderate, the car's cooling system provides the best combination of comfort and fuel economy in the UAE's climate. Studies and local driving data consistently show that setting the temperature significantly lower (like 16°C) forces the car's compressor to work much harder in our summer heat, which can increase fuel consumption by up to 20% on city trips with frequent stops. RTA Dubai recommends maintaining a moderate temperature for efficient cooling and reducing energy consumption from the vehicle. For a GCC-spec Toyota Corolla hybrid, for instance, driving on Sheikh Zayed Road with the AC at 22°C instead of 18°C can improve fuel efficiency by about 0.8-1.0 km/l. The cost impact is real: based on Special 95 fuel at approximately AED 3.00 per liter and an annual mileage of 25,000 km, an inefficient AC habit can add over AED 600 to annual fuel costs. Setting it around 23°C is often the optimal point where most people feel cool enough without overloading the system. The MOI UAE also advises regular vehicle maintenance, including AC system checks, to ensure optimal performance and fuel efficiency. For a more detailed comparison:
| Temperature Setting (AC) | Estimated Fuel Economy Impact (Typical Sedan in UAE Summer Traffic) | Relative Fuel Consumption | Annual Extra Cost (25,000 km) |
|---|
| Recommended (22-24°C) | Baseline (~11.5 km/l) | Optimal | Baseline |
| Very Low (16-18°C) | Can drop by 10-20% (~9.2-10.4 km/l) | High | +AED 500 - AED 800 |
| Key takeaways from expert and owner experience include: | | | |
| -Fuel economy: The AC system can use up to 20% more fuel when set to very low temperatures in hot weather. | | | |
| -Efficient range: Most people find 22°C to 24°C comfortable for UAE commutes, balancing cool air and compressor load. | | | |
| -Cost impact: Over a year, inefficient AC use can add hundreds of Dirhams in extra fuel costs for a typical driver. | | | |
