
Driving with the windows open had no measurable effect on fuel economy.

Testing by Consumer Reports found that using a car's air-conditioner resulted in a more than 3-mpg loss at highway speeds.There's no A/C in base versions of the Chevrolet Aveo Honda Civic Hyundai Accent and Elantra Jeep Wrangler Kia Forte and Rio Mazda 3 Mitsubishi Lancer Nissan Versa and Toyota Tacoma.Today, more than 99 percent of all new cars are air-conditioned.Volkswagen calls its manual air-conditioning system "Climatic " automatic A/C is "Climatronic.".Dual-zone automatic climate control allows for separate temperature settings for driver and passenger some cars have additional zones for rear-seat passengers.After the freon used in A/C units was blamed for depleting the ozone layer, automakers were required to switch from R12 to the less harmful R134a refrigerant by 1996.In a 1971 front-page story, the New York Times implicated air-conditioning in the death of the convertible, postulating that: "In the age of air-conditioning, real air has lost its value.".For cars not equipped with factory air, dealer-installed, under-dash units were popular.Some brands affixed window decals to promote their air-conditioned automobiles.By 1969, more than half of all new cars sold were equipped with A/C.


These trunk mounted systems deliver much more volume than standard trunk systems and are ideal for larger cars. The 1940 Packard was the first car to offer factory-installed air-conditioning. Vintage Air High-Capacity Trunk-Mount Systems When space is limited, you can still get your classic chillin' with Vintage Air High-Capacity Trunk-Mount System.
