tetra ethyl lead is a gasoline additive that was developed in the 1920s so cars could be made with higher compression & use less gasoline because the proven oil reserves at that time indicated the world would run out of oil (&gasoline) by 1940. with the higher compression permited by ethyl it was thought the oil could be made to last until 1950 or so.
as we now know more oil was found but the ethyl was already available so more efficient higher compression engines continued until they reached a high of 10 to1 or more in the late 60s which required 98 octane ethyl gas, standard engines with 9 to 1 compression ran on 92 octane leaded regular.
in order to reduce photochemical smog the government decided all cars should have catalytic converters that changed carbon monoxide (co) into carbon dioxide(co2) & water. tetraethyl lead prevents catalytic converters from working so they mandated any cars made after 1972 would have to run on 87 octane unleaded gas this required reducing the compression ratio to 8 or 8.5 to1 which reduced power & efficiency and also caused cars to use 15% to 20% more gas which made the oil companys happy because it cost less to produce the unleaded,they sold it at the same price,& you had to buy more of it because of the reduced milage.
this did reduce smog, you cant believe how bad the smog was in the 60s. but it also greatly increased the production of greenhouse gas (co2 is a greenhouse gas co is not) through the action of the converters so now we have a different concern.
the lesson from all this is politicians are not scientists & cant be expected to look at all sides of a problem (or even understand it) before they pass feel good laws to get themselves relected & there are no simple answers, everything has both desired & undesired effects. be careful what you ask for,you may get it!
2007-12-19 16:18:27
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answer #1
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answered by Who Dat ? 7
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Gasoline from the 60s contained Tetra-ethyl lead, an additive that facilitated the ignition of the gasoline vapors in the cylinders, thus increasing horsepower in the engine. Leaded gasolines were discontinued in the 80s due to the evidence that children living near heavily-traveled highways and freeways had much higher levels of lead in their blood than children living further away from such areas. Lead is poisonous, and children with high lead levels in their blood can have mental retardation and other developmental health problems.
Ethanol is a form of alcohol which is very corrosive. It can be made from corn, or from sugar cane, like they make it in Venezuela.
2007-12-19 21:52:34
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answer #2
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answered by correrafan 7
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Ethyl was a gasoline additive which helped eliminate knocks in the engine when octanes were not as consistent as they are now. Ethenol is a biofuel which is the result of distilling corn.
2007-12-19 21:51:15
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answer #3
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answered by googie 7
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Correraf means Brazil, not Chavez's Venezuela (making grain alcohol for transportation use). Venezuela.has oil.
2007-12-19 22:10:56
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answer #4
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answered by jburdman7 2
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Ethel was named after a woman and was premium grade gas made from oil. Ethanol is alcohol made from fermenting sugar.
2007-12-19 21:43:27
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answer #5
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answered by Neomaxizoomedweebie 3
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