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LUXEMBOURG - MAY 29: A driver fills up the tank of his car with diesel at a fuel station on May 29, 2008 in Luxembourg city. Customers are driving up to 100 km from neighbouring countries Belgium, France and Germany to fill up their vehicles with fuel, which is much cheaper in Luxembourg due to lower taxes. (Photo by Mark Renders/Getty Images)

LUXEMBOURG - MAY 29:  A driver fills up the tank of his car with diesel at a fuel station on May 29, 2008 in Luxembourg city. Customers are driving up to 100 km from neighbouring countries Belgium, France and Germany to fill up their vehicles with fuel, which is much cheaper in Luxembourg due to lower taxes. (Photo by Mark Renders/Getty Images)