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Updated on February 5, 2010

Everyone believes that using one’s car airconditioner consumes more fuel, but the startling result of a controlled research has got us all wrong. On the other hand these guys are saying: “To save fuel, use your airconditioner!” Alarming as it is, it is true and scientifically proven.

Three same-model cars were selected for the test. They were to cover the same distance, x, in the same time, y, and therefore at the same velocity, v. All external variables were made as constant as possible for all three cars so that the results would not be ambiguous or misleading.

Car A was to make the trip with the glasses up, the AC turned on

Car B was to make the trip with the glasses up and the AC turned off

Car C was to make the trip with the glasses down, and the AC turned off


It was discovered that Car C had consumed more fuel than Cars A and B, both of which appeared to have burned an equal amount of fuel. Several theories were proposed to explain the puzzle, the most scientifically-compelling of which was that the air resistance was highest for Car C which had to do more work, which meant burning more fuel in order to overcome the negative force exerted by the air against which it moved. Cars A and B with their glasses up did not bother much with this negative force and therefore did not burn the extra fuel.

So, based on the authority of these reports, “Save fuel: turn on your airconditioner!” is insightful wisdom, ironical though it sounds.


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      Peter Effiong 5 years ago

      I was equally checking through the internet for fuel saver tool since the government of Nigeria increase the price of fuel. it was shocking to me that using AC does not really consume much fuel as many people thing.

      there are fuel saver now in the market that can save you up to 15-20 on your fuel consumption, see more on , research online and you will be lucky to get better alternative to saving more fuel instead of turning your AC off.