More of a curiosity question, but I'm trying to figure out the most fuel efficient way to run the AC in my car, assuming I must use AC. I already know when to open windows vs use AC, so I'm looking at what to do if I'm traveling fast enough that AC is the better option.
I have three options I can set. I can increase the fan, I can increase the 'cold' value for the AC, and I can turn on and off the AC. If I'm trying to figure out a way to keep the temperature cool enough to be tolerable which of these options do I use?
I would assume that usually having the fan on max value with the actual 'temperature' set a lower setting (cooler, but not cold), and leaving that on all the time, would be the most efficient. However, that would depend on exactly how the AC works and how smart it is about adjusting the power of the AC when I keep the temperature on a warmer setting.
Anyone have a more definitive answer?