We use cookies on whatcar.com to improve your browsing experience and to provide you with relevant content and advertising, by continuing to use our site you agree to this. Please see our privacy policy for more details. Continue

U - Unleaded

05 June 2006

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.


Want to know the difference between your APRs and your PCPs? Our Glossary will guide you through the minefield of car-buying terms.

Haymarket Logo What Car? is brought to you by Haymarket Consumer Media
What Car? is part of Haymarket Motoring
© Haymarket Media Group 2015