Auto Climate Control and MPG
CXRabbit said:
So answer this:
Model you have: __ AWD / __ FWD?
City/Hwy driving: _____% / _____%
Driving: __ Lead Foot / __ Average / __ Grandma
MPG you're getting: _____
Average gas cost per week: ______
Thanks!
AWD GT Moonroof, Bose, No Tech Package
city: 10%, Hwy 90%
Average MPG, 18-22, if running 75-80 on the Interstate in light traffic is average
Average cost of miles driven $2.30 for premium. I run 250-350 miles a week, so that's about $26 to $45 a week in gas. I can buy more gas; I can't buy more time.
After seriously studding the Owner's Manual, I have become to believe the following:
Regardless of the settings when the climate contol system is set in AUTO, the green light comes on the temerature control dial, the green light on the ac button lights, and air flow is directed at the floor and windshield.
The system is trying to dehumidify incoming air regardless of ambient temperature, mainly so your warm body's outgassing won't fog the windows.
So what? It's running the a/c regardless of OAT, so you're paying to run it at time you don't need it or only need it briefly (in cold weather). This might explain some of the "poor" MPG many are experiencing.
The solution is to set the temperature you want, hit the AUTO button, adjust the airflow where you want it (which makes the green AUTO light go out) and click the AC button so that the light goes out.
I call this the semi-automatic mode: temp is controlled to the temp you set with out running the AC to dehumidify, and it will remain set in this condition after your restart the car. If the windows fog up a bit, punch the AC button and let the AC run for a couple minutes. If you punch the AUTO button, it resets the air flow outlets and turns on the air.
So, if you're truly concerned about a get a couple more mpg, try the semi-auto settings and save some gas.