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It is petrol (gasoline) that has not had its apparent octane level enhanced by tetra ethyl lead (TEL) to reduce knocking in automotive fuel. This was a common practice in the past but now this improvement to petrol burning characteristics is achieved by the addition of other additive packages (MMT, oxygenates including MTBE, TAME, and ETBE) and modified formulations. Some aviation fuels still contain lead (100 octane avgas for piston-engine aircraft).

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12y ago

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What free petrol has been introduced to reduce air pollution?

lead free petrol....


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can content in petrol if not unleaded


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What is unleaded petrol made up of?

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dangerous.....