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U - Unleaded

05 June 2006
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Unleaded - Lead was originally added to petrol to act as a lubricant and help prevent wear in the engine. However, it was later linked with emissions that were harmful to health, so the lead content was gradually reduced and, finally, unleaded fuel was introduced. Emissions control systems, such as catalytic converters, rely on unleaded fuel. Leaded fuel has been banned from general sale since 2000.

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