Smooth driving saves motoring costs
Driving smoothly and less than 60mph can save you money on fuel costs without compromising journey times
Smooth driving, or hypermiling as it is known in the US, can save you money on fuel costs. Research by DriveGain, a hypermiling app producer, shows that limiting your maximum speed to 60mph can decrease your vehicles fuel consumption by 10% but will only add 2 minutes to the average journey time.
Hypermiling has become a popular way to decrease motoring costs but its methods have come under fire from safety groups. For example tailgating large Lorries on motorways to gain momentum from the drag of the lorry.
http://drivegain.com/about/press
http://en.wikipedia.org/wiki/Hypermiling