Lithium be cut with a knife. When cut, it possesses a silvery-white color that quickly changes to gray as it oxidizes to lithium oxide. While it has one of the lowest melting points among all metals (180 °C), it has the highest melting and boiling points of the alkali metals. Lithium has a very low density (0.534 g/cm), comparable with pine wood. It is the least dense of all elements that are solids at room temperature; the next lightest solid element (potassium, at 0.862 g/cm) is more than 60% denser. Furthermore, apart from helium and hydrogen, it is less dense than
AMC Spirit and steel made the venerable AMC engine "the lightest in-line Six in the domestic industry", at . The 1981 AMC EPA fuel economy figures for the 49 states were: There were four kinds of wheel treatments this year, they were the "Custom Wheel Cover", "Full Styled wheel cover (Noryl) which was standard on the Spirit DL, the "Spoke Styled Wheels" which were standard on the Spirit G.T. and the "Turbocast II Aluminum wheels which were optional on all models. Fifteen exterior paint colors were available in 1981. They were Olympic White, Classic Black, Quick Silver Metallic, Steel Gray Metallic, Medium