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Old 05-25-2008, 01:01 PM
Unforgiven Unforgiven is offline
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Unforgiven will become famous soon enough
Not sure if any of you watch Mythbusters (cool show) but they did an episode on A/C vs. Windows down:

Tests were performed under varying conditions (55 mph versus 45 mph). The 55 mph test used a computer to estimate fuel efficiency based on air intake, not actual fuel consumption, and showed A/C was more efficient. The 45 mph test consisted of running the tank until it was empty, and showed open windows were more efficient. *Because the original tests were inconclusive, this "urban puzzle" was revisited in episode 38: It is more fuel efficient to use air conditioning when the car is traveling approximately 50mph or more. Otherwise, windows are more fuel efficient.
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