The Energy Saving community says that the most efficient speed you can drive a car in terms of achieving the best fuel economy is 55-65mph. Any faster, though, and the fuel efficiency decreases rapidly. For example, driving at 85mph uses 40% more fuel than at 70mph....
Most drivers dread the winter season as it poses a real challenge to the fuel efficiency of their vehicles. During these seasons, temperatures drop below the freezing levels hence the fuel inefficiency of most vehicles. The conventional gasoline-powered vehicles...