There was a thread on fuel milage a couple weeks ago and it was suggested that it's actually more efficent to run with the AC turned on than with the windows open. I tested this over the weekend driving 400 miles in my '98 Durango. At 70mph we got 15mpg with the windows open for 200 miles. With the windows closed (same speed) and the AC on we only got 13mpg for the second 200 miles. This was confirmed with the instant MPG readout and a miles/gallons calculation after refueling at the 200 mile mark.
While this may not be true for every vehicle I'm fairly convinced its more efficient to avoid using the AC. (I also acknowledge that 70mph in a Durango is not the most economical way to travel)
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Today's Featured Article - Restoring a John Deere 2010 Diesel Tractor - by Jim Nielsen. Following seven years working in California's Silicon Valley, my wife, baby son and I moved back to Australia to retire. We bought a small 'farm' of about 50 acres near Bendigo, in the state of Victoria. I soon found that it would be very useful to have a tractor around the place for things such as grading our long drive and brush-hogging the fields. I was also embarking on planting 1000 eucalyptus trees, and hence I would need a ripper, small disk plow, sprayer etc. to get these things accompli
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