I had the Michelin EnergySaver AS tires as OE on my 2011 Ford Fusion with AWD. There was a noticeable improvement in how the Ford performed under winter conditions when I switched to Continential tires (either Pure Contact or True Contact, I don't call which one.) I was not impressed with the way the Michelin tires performed in winter conditions. With my Volt my solution, so far, has been to not take the Volt on the road when the weather/road conditions are bad so I can't comment on how the Michelin EnergySaver AS tires perform on the Volt. You can check TireRack for their rating of how different tires perform in specific driving conditions.