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Tetraethyllead (commonly styled tetraethyl lead), abbreviated TEL, is an organolead compound with the formula Pb(C 2 H 5) 4.It was widely used as a fuel additive for much of the 20th century, first being mixed with gasoline beginning in the 1920s.
A side effect of the lead additives was protection of the valve seats from erosion. Many classic cars' engines have needed modification to use lead-free fuels since leaded fuels became unavailable. However, "lead substitute" products are also produced and can sometimes [when?] be found [by whom?] at auto parts stores [example needed]. [citation ...
The major source of lead exposure during the 20th century was leaded gasoline. Proponents of the lead–crime hypothesis argue that the removal of lead additives from motor fuel, and the consequent decline in children's lead exposure, explains the fall in crime rates in the United States beginning in the 1990s. [4]
Sign advertising Ethyl additive, on an antique gasoline pump in the USA. Ethyl Corporation is a fuel additive company headquartered in Richmond, Virginia, in the United States. The company is a distributor of fuel additives. Among other products, Ethyl Corporation distributes tetraethyl lead, an additive used to make leaded gasoline.
Fuel additives in general Ether and other flammable hydrocarbons have been used extensively as starting fluid for many difficult-to-start engines, especially diesel engines; Nitromethane, or "nitro", is a high-performance racing fuel; Acetone is a vaporization additive, mainly used with methanol racing fuel
Thomas Midgley Jr. (May 18, 1889 – November 2, 1944) was an American mechanical and chemical engineer.He played a major role in developing leaded gasoline (tetraethyl lead) and some of the first chlorofluorocarbons (CFCs), better known in the United States by the brand name Freon; both products were later banned from common use due to their harmful impact on human health and the environment.
The early extreme pressure additives were based on lead salts of fatty acids ("lead soaps"), "active sulfur" compounds (e.g. thiols and elementary sulfur), and chlorinated compounds. During the 1950s the use of lead soaps was eliminated and replaced by zinc and phosphorus compounds such as zinc dithiophosphate. [3] Some of the EP additives are:
AD-X2 was an additive purported to extend lead–acid automotive battery life, [1] marketed by California bulldozer operator Jess M. Ritchie in the late 1940s and early 1950s. After it was declared a fraud by the National Bureau of Standards (NBS), a media blitz alleging collusion between battery manufacturers and the government led Commerce ...
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