Ford's F-150, despite overhaul, still faces emissions, mpg hurdles

Ford Motor Co. executives spared no expense in overhauling the crown jewel of their empire, the F-150. They gave the truck a new aluminum body, smaller turbocharged engines and a lighter and stronger steel frame -- all with an eye to appease U.S. regulators demanding cleaner vehicles. The initiative took six years and cost Ford more than $1 billion.