What is the automatic Nissan converse?

Every car has its own economical speed. Running fast and slow is a waste of oil! Overtaking, grabbing roads, and merging (disorderly direction) are even more waste oil. We should also learn to predict: it's almost the traffic lights, so it is estimated that it is possible to change the lights. Frequent braking is also a waste of oil (commonly known as: one foot brakes one foot oil), and there seems to be an egg between the foot and the accelerator pedal.