From DetNews.com

DETROIT — Government and auto industry officials expressed optimism today about the future of diesel-powered passenger cars and light trucks, even as an oil industry official expressed concerns about the costs of dramatically increased diesel fuel use.

Americans use 140 billion gallons of petroleum a year — or more than 20 million barrels of oil a day — with estimates suggesting use will top 200 billion gallons in the next decade as the number of vehicle miles increases by about 2 percent yearly. America’s 230 million vehicles traveled 3 trillion miles last year, up 30 percent since 1985.