C8H20Pb, an organometallic used as a gasoline additive that prevents engine knocking. Leaded fuel allows for better efficiency, but the lead released in car emissions, as lead oxides, is very toxic to humans. Lead would get deposited on the road and get washed away into drinking water. [Analytical Chemistry; v68; p3008-3014; 1996.] [Atmospheric Environment; v37; 3077-3089; 2003.]