Feb 24, 2007; Fontana, CA, USA; A Sunoco employee fills a gas tank with unleaded fuel in the Nascar Nextel Cup Series garage during practice for the Auto Club 500 at California Speedway. This race marks the first time that Nascar is using unleaded race fuel. Mandatory Credit: Mark J. Rebilas-Imagn Images Copyright ยฉ 2007 Mark J. Rebilas

More Great Content