By how much does fuel consumption increase due to aerodynamic drag when the windows are fully lowered?
Preventive and Efficient Driving – Observation and Fuel Saving
Explanation
To understand why fully lowering the window panes increases fuel consumption by 5%, it is important to consider **aerodynamic resistance**.
- **Aerodynamic resistance**: When a vehicle moves, it must overcome air resistance. This resistance is one of the main factors that increase fuel consumption.
- **Lowered windows**: By lowering the windows, air enters the interior of the vehicle, which increases aerodynamic resistance. This forces the engine to work harder to maintain speed, thus increasing fuel consumption.
- **Measures to reduce consumption**: It is recommended not to lower the windows while driving to minimize the impact of air and, therefore, fuel consumption.
In summary, lowering the windows increases aerodynamic resistance and, as a result, fuel consumption increases by **5%**.
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