I’m confused on the air conditioning controls. Any advice on what is the best way to run the air (Outside air vs. circulate from within)? Do I turn on both or one? Which way helps get better gas mileage?
:agree:Using the AC does put a load on the engine, and will reduce fuel mileage. What has been measured, and I have successfully tested this myself in other vehicles, is that at highway speeds, the drag from the AC compressor is equal to or less than the drag from open windows. Cars are a lot more aerodynamic than they used to be. Driving around town, your mileage will be lower if you use AC.