Howie411 Report post Posted April 7, 2010 (edited) Well its been about 90 in Northern VA the last few days and I've been using the AC (keeping it on 68) and my MPG has dropped from 41-44 to about 30-31. This is worst then when it was winter. I guess the only time to get optimal mileage is to live where its fall all year long. Edited April 7, 2010 by Howie411 Quote Share this post Link to post Share on other sites
lolder Report post Posted April 7, 2010 At start with a warm car turn off the AC and open all the windows and (sunroof) for a few minutes. After most of that heat is gone, close up, turn the AC on to 72 or higher. It should only cost you a couple mpg. then. Watch the accessory load in "Empower". Driving with the car open for a few minutes cools quicker anyway. Park in the shade. Quote Share this post Link to post Share on other sites
Oman Report post Posted April 7, 2010 68? The amount of energy the A/C uses is exponential to the temperature differential being requested. I run the A/C most of the summer and suffer a loss of about 2-3 MPG. I keep it at about 75. Remember that there is no real insulation on the car since much of the surface area is single pane glass. Also use the recirculate option once the car cools off a bit. At 68 I bet the fan stayed on high and the compressor ran full time. Jon Well its been about 90 in Northern VA the last few days and I've been using the AC (keeping it on 68) and my MPG has dropped from 41-44 to about 30-31. This is worst then when it was winter. I guess the only time to get optimal mileage is to live where its fall all year long. Quote Share this post Link to post Share on other sites
Ranger_Rick Report post Posted April 8, 2010 A little 4.5 mile drive for me.To: temp 63, mpg 41Fro: temp 85, mpg 48 (fro is down the little incline)Nice to have good mileage Spring Forth :hysterical: (windows open, climate control off) Quote Share this post Link to post Share on other sites
FFHdriver Report post Posted April 8, 2010 A little 4.5 mile drive for me.To: temp 63, mpg 41Fro: temp 85, mpg 48 (fro is down the little incline)Nice to have good mileage Spring Forth :hysterical: (windows open, climate control off)I keep mine on 72 degrees year round and the AC is on when the car is running any month of the year. The only difference I can tell is when the ICE runs more during cold weather. I get about 34-35 MPG around town in cold weather and 37-39 in hot weather. Quote Share this post Link to post Share on other sites