What Does Premium Unleaded Mean?

Premium gas is similar to regular unleaded fuel. ... Octane refers to how well the fuel can resist pre-ignition. With an octane of 90 or higher, premium gasoline is less prone to pre-ignition or knocking. Premium fuel also contains detergents and additives that help engines run cleaner.

Is premium unleaded better for your car?

In a consumer notice, the Federal Trade Commission, notes: “In most cases, using a higher-octane gasoline than your owner's manual recommends offers absolutely no benefit. It won't make your car perform better, go faster, get better mileage or run cleaner.”

Does premium unleaded make a difference?

Using fuel of a higher octane than your engine needs or can benefit from won't hurt it, only your wallet. The difference between premium and super unleaded at the UK forecourt these days is a maximum of two points (97 octane versus 99) and the chance of a modern engine being damaged by the lower of the two is nil.