1.   Heavy materials also boost vehicle weight, which reduces fuel efficiency.

2.   One, vehicle weight, is obvious, but another is less advanced technology.

3.   Still, the fuel economy is not so great, due to the vehicle weight, typical in this thirsty class of vehicle.

4.   The National Highway Traffic Safety Administration will issue several reports within a few days looking at the links between safety and vehicle weight.

5.   While the gross vehicle weight is often posted on a sticker in the door jamb, the curb weight and payload are usually not provided.