Energy efficient cars are well maintained cars and there are measures that every
car owner can take to maximum the energy efficiency of their own vehicle.
Check your tyre pressures regularly, as under-inflated tyres can increase your fuel consumption by as much as three per cent
Energy efficient cars are ones where all unnecessary weight and roof racks have been removed these only serve to increase the overall weight and air resistance of the car and that can impact mightily on the amount to fuel that you use. Check your boot for items that have no essential function being performed and no reason to be there and leave them in your home. Do you tend to leave your car filled with a lot of junk and things that are left there, just in case they might be needed. Use this as an excuse to have a good sort through of your things and kill two birds with one stone.
Air conditioning and other on-board electrical devices (like mobile phone chargers) increase fuel consumption, so only use them when necessary. It is much more efficient to charge electrical devices like this from mains sockets in your home. Car mobile chargers and similar items should only be used in an emergency when you are running out of battery and need to talk if you want to aim for joining the league of truly considerate energy efficient cars and drivers.
Energy efficient cars are ones that not only have in built fuel efficiency in their construction, but they are driven in such a way as to maximise their efficiency and additionally all the small details that add to their fuel consumption have been vetted, gone over and made sure that they are essential to the operation of the vehicle.