PASADENA, CA - MAY 30: A driver fills up at a Valero gas station in an area where the price of a gallon of a gallon of gas typically ranges from as low as $4.20 to more than $4.50, and diesel sells for more than $5.00, on May 30, 2008 in Pasadena, California. As fuel prices continue to hit near-daily record highs, the average price for a gallon of regular for the rest of the nation is expected to surpass the four-dollar mark in within days. (Photo by David McNew/Getty Images)