I have a simple question. When using the car AC, what action will help save fuel ?
1)
Will setting the temperature setting to a comfortable level rather than max cold, with AC on, save fuel ?
Unlike in AC units fixed in buildings where the temp setting actually sets a temperature, I felt that in my car, the temp setting knob seems to be opening and closing some ducts. So will it save fuel or simply let in less cold air or more cold air into the cabin?
2)
If the fan speed is set to a low comfortable setting rather than max speed, with AC on, will it save fuel ?
Of course with fan speed max, cabin feels colder.
Question Summery
In a normal car , will the setting of the air intake, or temp knob, or fan speed, affect the fuel consumption with AC on or is it a simple case of irrespective of what ever setting of the above controls, if the AC is on, it will consume the same amount of extra fuel and only way to save that extra fuel is to have the AC off ?