General Motors (GM -2.7%) sees a breakthrough coming in the use of magnesium in automobiles...

General Motors (GM -2.7%) sees a breakthrough coming in the use of magnesium in automobiles after its engineers find a way to expand the use of the metal to new parts of vehicles. The company notes magnesium is 75% lighter than steel and has a 33% advantage over aluminum which could help the automaker improve gas mileage. Licensing options for GM's patented process to prepare the metal for automobile production could bring in extra revenue down the line.