Luxury car makers have already adopted aluminum in many cars, instead of the heavier steel. The fuel savings become improved not only in the actual loss of weight holding the car back but also from other changes that this weight loss allows. With lower weight a vehicle can support a smaller engine, brakes and other components that add even more to fuel savings.

Ford was the first automotive manufacturer to use turbocharged and direct-injected V-6 engines on pickup trucks in 2011, replacing the V-8s. Now 43 percent of Ford F-150s sold contain EcoBoost engines.

The automaker is continuing to push for fuel efficiency in its best selling trucks, looking to replace steel panels with aluminum in its F-150.

Ford plans to release the aluminum Ford F-150 in July 2014 and although initial prices might be higher, the gas savings will be significant. Ford's goal is to reduce the weight of the truck by 700 pounds with aluminum replacing steel in the roof, hood, body, doors and tailgate of the car.

This would add approximately $1,500 to the cost of the truck but would provide an 8 percent gain in fuel savings.