The U.S. relaxes fuel standards, significantly lowering automakers' technology costs: General Motors (GM.US) is expected to save $20.4 billion, and per-vehicle prices may drop by nearly $1,300.

According to the National Highway Traffic Safety Administration (NHTSA), General Motors (GM.US) is expected to see its technology costs drop by $20.4 billion by 2031, due to the significant reduction in fuel economy standards finalized this week.