The 2013 Ford C-Max Energi is a plug-in hybrid. But if you keep your trip lengths relatively short, and get in the habit of plugging in at home and perhaps at work, it does a really good job pretending it's an all-electric car. Selecting the Energi's 'EV Now' mode, we managed to do a 20-mile round-trip errand, out to the suburbs and back, with...