That reviewer who bemoaned the Energi's periodic use of the ICE in EV mode is missing the practical point behind EVs and hybrids. It's to reduce my use of fossil fuels, which my C-Max Energi's 65mpg lifetime average has accomplished. The point isn't to rack up as many EV miles as you can, for purity or piety's sake. Did the writer realize that when the ICE "fires up" for engine braking, there's no fire? Fuel is cut off while the engine pumps air against its own compression.