ORNL researchers quantify the effect of increasing highway speed on fuel economy
Green Car Congress
JANUARY 18, 2013
legal light-duty vehicles from 1984 to present. One tip is that drivers should obey the speed limit since the fuel economy of most vehicles decreases above 50 mph [80 km/h]. Vehicles were tested in dynamometer laboratories at steady speeds from 40 to 80 mph [64 to 129 km/h], with the proper road-load applied. 50 to 60 mph.
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