Car manufacturers should make cars safe in pursue of high fuel efficiency. Thus, more and more aluminum are used in car producing for its feature as light and solid.

Chrysler Pacifica, the product of 2017 of Fiat Chrysler Automobiles, is coming to market. It weighs 4315 pounds, 250 pounds lighter than the old model, being the lightest truck in the world by now.

Jessica LaFond, the general engineer of FCA, said that they have spent five years studying production processes. Customers want cars with more high-tech and safety equipments, which will increase the weight of cars and makes it harder to design light automobiles. So engineers have applied high-strength steel, aluminum, magnesium and other materials to reduce the weight while increase the strength. It is worth mentioning that the application of aluminum sliding doors has cut down forty pounds and raise the fuel efficiency by 10%.