Hello Paul, I am often confused as to whether use of AC (Cold/Hot Air) consumes a lot of fuel. Or should I open the window screen in order to save fuel. Which is which? Angela
Hello Angela, using your car’s air conditioning (AC) while driving does increase fuel consumption because the system places an additional load on the engine. It is always a trade-off between comfort and fuel economy, and the choice depends on individual preferences.
Opening your car windows instead of using the AC can help improve fuel economy, but only to a point.
When driving at speeds above 50 km/h, the strong air entering the cabin creates drag (wind resistance), which in turn increases the engine’s workload and reduces fuel efficiency.
To minimise this effect, it’s best to open your windows only slightly when driving at higher speeds.
Many modern cars are equipped with an Eco Mode that balances AC use and other power demands to maintain maximum efficiency.
This feature allows you to stay comfortable without significantly compromising fuel economy.
Check if your car has an Eco or Econo mode and make use of it for better performance and fuel savings.