As General Motors gets ready to start 2015 Volt production Monday, Chevrolet is looking back at some of the numbers that got the car to where it is today. The headline number is that Volt owners have collectively put more than a half-billion electric miles on their cars. The unsurprising upshot is that, if you went out and bought a Volt, you're pretty keen on getting as many electric miles out of it as possible.
When it comes to the country's two most popular plug-in vehicles, a premium-gas-powered security blanket can make the difference of about four all-electric miles a day. That's the crux of the US Department of Energy's EV Project Vehicle Summary Report for the second quarter of 2013 on how drivers use the Chevy Volt (PDF) and Nissan Leaf (PDF).