Fuel Saving Tips: Is Driving with Open Windows on the Highway a Waste of Petrol? Understand the Reason!
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Fuel Saving Myth Busted: Open Windows on Highway Waste More Petrol Than AC!
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News18•04-04-2026, 16:42
Fuel Saving Myth Busted: Open Windows on Highway Waste More Petrol Than AC!
•Driving with windows open on the highway (above 60-80 km/h) creates aerodynamic drag, forcing the engine to work harder and consume more fuel than running the AC.
•The drag effect from open windows can lead to higher petrol consumption than the 5-20% increase from using the AC.
•In city traffic at low speeds (below 40 km/h), opening windows can be beneficial for fuel saving as AC use impacts mileage more.
•A study by the Society of Automotive Engineers (SAE) confirms that air resistance from open windows at high speeds is greater than the AC's engine load.
•Tips for saving fuel include parking in the shade, opening windows briefly to vent hot air, regular AC servicing, setting AC to 24°C, and keeping windows closed on highways.
