When NASCAR drivers fire up their engines this season, they will be doing so with more than just a few new drivers and new cars … they will also be using a new, environmentally friendly fuel as well.  This according to the New York Times, which reports how NASCAR officials are touting a new fuel developed by Sunoco that can help the association lower lead pollution at its racing events.  EPA officials say this important because NASCAR is exempt from the Clean Air Act and recent studies indicate that some mechanics and drivers in the Nextel Cup have experienced elevated lead levels in their blood.  Residents in the vicinity of racetracks are suspected to be at some health risk as well.  Here’s hoping this new fuel takes the checkered flag.