[UFO]

I drive mostly in town, with an automatic. If the light I approach I expect to turn green before I get to it, I will coast. If not, and my momentum will carry me through it, I engine-brake enough to maintain some momentum when it does. Of course I miss the light timing very often, so in general I will engine-brake to most lights, and use my brakes to stop if I need to. Then I put the transmission in neutral, as my fuel usage in D is double what it is in N.

Momentum is king. With my crude attempts at keeping momentum through more coasting and knowledge of DFCO, I increased my fuel mileage from 36-37mpg to a consistent 45mpg.