Drivers Bob Winger and Wayne Gerdes, left, top off the tank on the Volkswagen Passat TDI at the headquarters of Volkswagen Group of America on Friday, June 7, 2013 in Herndon, Va. Volkswagen of ... more 
Drivers Bob Winger and Wayne Gerdes, left, top off the tank on the Volkswagen Passat TDI at the headquarters of Volkswagen Group of America on Friday, June 7, 2013 in Herndon, Va. Volkswagen of America is challenging the existing Guinness World Record® achievement for the "lowest fuel consumption-48 U.S. states for a non-hybrid car." Two drivers will pilot a 2013 Passat TDI® Clean Diesel on an 8000-mile, 48 contiguous state drive leaving from and returning to Volkswagen's Herndon, Va. headquarters. (Kevin Wolf/AP Images for Volkswagen of America) less 
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Associated Press
Fri, Jun 7, 2013 4:06 PM EDT