You may already know this, but for those that are wondering - this is called "Start-Stop" and is built into many new cars. The feature saves about 10% in fuel u

You may already know this, but for those that are wondering - this is called "Start-Stop" and is built into many new cars. The feature saves about 10% in fuel usage: http://en.wikipedia.org/wiki/Start-stop_system http://en.wikipedia.org/wiki/Start-stop_system