Turning on the air conditioning uses, according to recent studies and reported in NM, extra fuel that can increase by 30% in city driving and 20% more in motorway driving. However, consumption can become even higher depending on the temperatures you set.

In a typical air conditioning system, Consumer Reports state that if you select a temperature higher than the minimum you will be forcing the system to reheat air that was already cold.

This requires more effort from the system and consequently increases fuel consumption.

So set your temperatures to a minimum for the most efficient use of air conditioning in your car.