Idling the auto places stress on the modern-day fuel injection systems in today's cars. Idling was applied in chilly or warm climates when fuel injection wasn't widespread in older vehicles. To maintain the engine from delaying, people used to keep it running or it might not activate.
If you actually require the automobile to maintain running with the Air Conditioning on in summers, keep offering revs to the automobile to make sure that the engine runs much better and oil circulates inside the engine. Since India is a very damp countryside, Air Conditioner is always on, but try using it much less usually considering that it places stress on the car parts and you intend to extend the life of your auto do not you?