what is the adv. and dis-adv. of leaded and unleaded gasoline?

Question

comparison

Answer 1

Lead was added to gasoline to increase its "octane" rating; i.e., its ability to burn without producing preignition and consequent damaging engine knock. Another useful property of the added lead was that it coated the mating surfaces of valves and their seats, thus aiding heat transfer and prolonging valve life. After lead was removed from gas, valve systems were designed to provide adequate heat removal without the aid of lead. (See ref. 1)
The disadvantages of lead are its toxicity and its damaging effect on catalytic converters. The toxic compounds would enter the human system directly via inhalation and by a more indirect route in which lead is deposited on crops grown near roadsides which were either eaten by humans or used as feed for livestock. And as answer 1 points out, the worst damage was done to the brains of children (ref. 2). Someone who says that wasn't a problem could be suffering from lead poisoning.

Answer 2

the reason lead was in gas - it was a luberacate for the heads in the engine. Plus it helped with knocking. New tech with unleaded gas solved the knocking problem. Has far as that igmo about with his cheaper and posining kids. Thats a load of crap

Answer 3

Leaaded gas saves money for oil companies as they can use a cheaper mix but it poisons humans by causing brain damage, particularly in young children.

Answer 4

leaded gasoline reduces knocking of the engine..............adv.
causes pollution because of emission of poisonous lead monoxide............dis adv.