[Tcoat]

Originally Posted by serialk11r

It uses the car's kinetic energy to power the engine. That energy is not free. Coasting down a hill saves it.

Imagine if you were travelling down a slight hill, steep enough to maintain whatever target speed. If you were engine braking, the car would slow down, and you'd have to keep on applying gas over and over to recover speed. If you coast down the hill, you only burn what fuel it takes to idle, which if you're going fast enough could be less than the engine brake -> apply gas -> brake -> apply gas cycle.

Not going to go through the whole "coasting is good" debate again because I am obviously wasting my time but the practice does not save any gas and is dangerous on top of that. If you want to turn your car into a giant Hot Wheels then that is your business.