no, actually, it takes fuel to use the a/c. Another thought ... with the windows closed, there is less air drag, which then makes the car more aerodynamic.
No use for exhaust in car air conditioning
Because the air conditioning compressor, is run from a pulley off of the engine. This puts an additional load on the engine, which causes more fuel to be used.
Air-Conditioning. Mirrors. Fuel Injection. ......
No, it is not safe to use propane in a car's air conditioning system. Propane is highly flammable and can pose a serious safety risk if used in place of the recommended refrigerant. It is important to use the proper type of refrigerant for your car's air conditioning system to ensure safe and efficient operation.
Cadillac Motor Car Division in April of 1953
The answer is very subjective to your car. I have a pretty new car and it goes easily for 20 miles, if you don't use air conditioning.
Because of the "drag" caused with windows down, it is usually more beneficial to drive with the windows up and the air on. For more information, check out HowSTuffWorks.com.
Remember that air conditioning is powered by electricity. How that electricity is made will determine its affect on the atmosphere. If it comes from Solar or Wind power, there is no effect. If it comes from Fossil Fuel, there are Greenhouse Gases given off. Nuclear power has its own set of issues. If the AC is in your car, then you will use more fuel, and emit more greenhouse gases as exhaust.
The MAP sensor measures air flow for your car's computer. The computer uses air flow to set fuel flow for the correct fuel/air mixture.
1994 and earlier use R-12 1995 and later model years use R143A
On the side of air conditioning causing the car to use an unnecessary amount of fuel, this fact is true. Sort of. The truth is using the car's air conditioning does burn more gas, especially when driving in town. In this driving situation fuel consumption goes up by roughly 10%. A good rule of thumb to follow is when the car is moving at a rate of 40 mph or slower, driving with the windows down is definitely the better option for fuel efficiency. That means that for trips to the grocery store, post offices, and visiting ma and pa, drive with the windows down. On the other side of the debate, we have the air conditioning saves on gas due to eliminating air drag on the car from the open windows. Once again, this theory is correct as well, in certain conditions. When driving on the highway or at speeds greater than 45 mph, open windows increase air drag on the car to a point where fuel efficiency is lost by up to 10%. In cases where the vehicle is running at speeds closer to 55 mph, gas inefficiency reaches the 20% mark. Very simply put, both sides of the debate are correct depending on the kind of driving in question. When town driving, leave the windows open, when highway or higher speeds driving, the AC is definitely the way to go. This was found here: http://news.carjunky.com/air-conditioning-versus-open-windows-abc477.shtml