In 1921, General Motors researchers discovered that adding TEL to gasoline eliminated engine knocking and boosted octane levels cheaply. Despite early warning signs—including the deaths of refinery workers who suffered from "lead-induced insanity"—the fuel was marketed as a standard of modern efficiency. By the mid-20th century, aerosolized lead from car exhaust had become a ubiquitous part of the global atmosphere, settling in soil and entering the bloodstreams of billions.
leaded gasoline - U.S. Energy Information Administration (EIA)
While it is illegal for use in cars on public roads, you can still purchase leaded fuel in the following specialized sectors: where can you buy leaded gas
: Some jurisdictions still allow leaded fuel for specific marine engines, farm equipment, and vintage vehicles used exclusively at tracks. The Last Drop: The Global Era of Leaded Gasoline
The centennial history of leaded gasoline is a paradoxical tale of engineering triumph and public health catastrophe. Introduced in the 1920s as a "miracle" solution to engine "knocking," tetraethyl lead (TEL) allowed for the development of high-performance engines that powered the 20th century. However, this progress came at a staggering cost: a global health crisis that would take nearly 100 years to fully resolve. In 1921, General Motors researchers discovered that adding
: High-octane leaded racing gasoline is available through specialty suppliers like VP Racing Fuels and Sunoco Race Fuels . It is typically sold in 5-gallon pails or 55-gallon drums for off-road use only.
The scientific consensus eventually caught up to the industrial enthusiasm. Research revealed that lead exposure, even at low levels, caused irreversible brain damage in children, lowered IQs, and increased cardiovascular disease and strokes in adults. Some sociologists even point to the "lead-crime hypothesis," suggesting the spike in violent crime during the late 20th century was partially driven by widespread lead poisoning, which impairs impulse control. leaded gasoline - U
: Small piston-engine aircraft still rely on 100LL (low lead) aviation gasoline, which is available at approximately 13,000 airports across the United States.