The biggest hit I've ever seen by A/C on my Mustang was 20 MPG. Now, for some details....
There's a slight downhill stretch on my commute home. On Cruise control @ 35 MPG, Instantaneous MPG on the ScanGauge is 80 MPG. With A/C on, Instantaneous MPG is 60 MPG.
Real world differences at higher engine load are FAR less - maybe 2 or 3 MPG.
Most people don't even believe it's possible to get 30 MPG out of a 4 liter Mustang. :shrug:
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Fuel economy is nice, but sometimes I just gotta put the spurs to my pony!
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Originally Posted by thatguitarguy
Just 'cuz you can't do it, don't mean it can't be done...
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Originally Posted by elhigh
The presence of traffic is the single most complicating factor of hypermiling. I know what I'm going to do, it's contending with whatever the hell all these other people are going to do that makes things hard.
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