With 3 engine suppliers, 4 in 2015, there will surely be some difference in how and when the power units use the fuel. Even if we don't see cars actually run out of fuel hopefully it's going to spice up the final stages of races as some will have knock back the revs or risk not finishing. Teams with cars in the lower end of the points coming under attack late in a race could well take the gamble on running out, they face losing the points anyway.
Does anyone know if there's potentially harmful or costly damage that may occur if these new turbo engines run out of gas? With the current engines we often see cars deliberately running out of fuel in test sessions, or even practice, as teams seek to find accurate info on consumption and how much can be actually used from the fuel cell.