Does Driving with Windows Open Consume More Fuel?

[Kate]

It creates drag, thus consuming more fuel. When driving below 80 km/h, opening windows is indeed more fuel-efficient than using air conditioning. However, when the speed exceeds 80 km/h, the increased wind resistance from open windows makes it less fuel-efficient than using air conditioning. Here are some fuel-saving driving tips: Avoid opening windows on highways: It is not recommended to open windows for ventilation during high-speed driving; instead, use air conditioning for cooling. Maintain a steady speed: Try to keep the car's speed between 65 km/h and 90 km/h. Regularly check tire pressure and wear: Insufficient tire pressure or severe tire wear can lead to increased fuel consumption. Reduce vehicle weight reasonably: Remove items that are not frequently used in the car. Generally, every additional 100 kg of weight increases fuel consumption by 4.4%. Use the correct fuel grade: Fill the car with the recommended gasoline grade; avoid using fuel with a higher or lower grade than required.