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To lessen lead pollution. In the old days, the lead in gasoline was used to help lubricate the engine components that came in contact with it. Modern engines no longer need it as a lubricant.

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Q: Why did petrol become unleaded?
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Related questions

How will a Leaded petrol fuelled car be affected if Unleaded Petrol is used?

The valves, particularly the exhaust valves, will become damaged quite quickly


Is it ok to use unleaded petrol in 1989 rm 125?

yes you can use unleaded petrol in that bike


Lead content in petrol?

can content in petrol if not unleaded


What is the difference between unleaded gas and petrol?

Unleaded gas is petrol. In some countries they call it petrol and in others it is called gasoline or gas.


What is an unleded petrol?

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


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


Is petrol the same as unleaded gasoline?

Petrol is the French word for gasoline. Petrol is usually unleaded gasoline. Canadian gas stations advertise gasoline as Petrol, as do many other countries.


What are substitutes of leaded petrol?

unleaded


Is four stroke petrol unleaded?

Yes its using petrol unleaded while two stroke using two stroke oil


What is unleaded petrol made up of?

unleaded petrol is 91 octane petrol with not a trace of anti knock compound(tetra ethyl lead)...so that it produces no harmful emissions


How do you tell difference between leaded and unleaded petrol in a can?

I don't think there is a way to visually tell the difference between leaded and unleaded fuel. However, leaded gasoline has become "extinct" and it is more likely that you have unleaded gasoline in the can.


What does ulp stand for in cars?

Unleaded petrol