While performance, comfort, versatility, reliability, and design all are household features of 21st century vehicles, safety, fuel economy, and environmental demands remain critical issues. Fuel economy is intimately connected to environment. Lightweightening are crucial to both. Lightweightening is the key to making vehicles efficient and safe while still meeting the demands of fuel consumption and environment.

Lightweight materials are extremely important for the production of environmentally adjusted cars, due to the extra weight caused by having two drivelines. Weight will continue to be of the utmost importance in future car technology, since the lighter the vehicles are, the less fuel they will need. This is a fact that has double effects: environment, and economy.