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Lead is no longer added to petrol because it added to both air pollution and general health risks. It used to be added for help in maintaining the general "health" of an engine's valves as well as reducing engine knocking.

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10y ago

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Related Questions

Lead content in petrol?

can content in petrol if not unleaded


What is an unleded petrol?

Unleaded petrol is petrol that has not been treated with a lead compound.


How petrol engines function?

WHAT ARE THE BASIC PARTS OF PETROL ENGINE? HOW DOES PETROL ENGINE WORKS?


Advantages using unleaded petrol for cars?

in petrol we have 2 types.they are 1.leaded petrol 2.unleaded petrol in leaded petrol we have lead compounds so we call it as leaded petrol. in unleaded petrol we do not have lead compounds. the use or advantage of unleaded petrol is it does not emit harmful gases in to the environment. but leaded petrol emits harmful gases. cracking process takes place in unleaded petrol. cracking means it is a process of converting harmful gases into harmless gases. but this cracking process cannot be done in leaded petrol bcoz lead compounds decomposes the catylsts used in cracking process


What free petrol has been introduced to reduce air pollution?

lead free petrol....


What is the function of the distributor in petrol vehicles?

Spark timing


What are the benefits of petrol?

The beneifits of petrol is that it fuels your car and it lets it go many kilometres. Petrol is also a fossil fuel and will be around for the next hundred of years. Also petrol doesn't contain lead, unlike the earlier types of petrol which contained lead and can damage your heath. the benefit of petrol is that it gives fuel to your car so it can work and drive kilometers and more.


What type of petrol reduces lead pollution?

unleaded


Why is lead in petrol?

It isn't anymore. That's why its called Unleaded.


What is the role of lead when added in petrol?

It's a pollutant. A Neurotoxin.


What is unleaded petrol made up of?

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Was lead removed from petrol because it was dangerous or it was cheaper to produce with out it?

dangerous.....