What’s in our Synergy Supreme⁺ 99 premium petrol

Our Synergy Supreme⁺ 99 petrol has more cleaning power than our regular petrol – and includes molecules whose job it is to reduce the friction in your engine helping the moving parts work more efficiently.*

What is the difference between regular and premium petrol?

Our Synergy Supreme⁺ 99 Unleaded is our highest octane fuel. Higher octane can help to reduce knocking-related performance losses in modern cars.

Our Synergy Supreme⁺ 99 Unleaded fuel also has extra additives which can benefit all petrol cars, even older ones.* Synergy Supreme⁺ 99 Unleaded fuel has double the amount of detergent additive compared to our regular petrol, which helps give your engine a deeper clean. The cleaner your engine, the better it can perform and the more fuel efficient it is.

Synergy Supreme⁺ 99 Unleaded fuel also contains molecules that help to reduce friction in your engine helping the moving parts work more efficiently.*

What is octane?

The octane rating of petrol is a measure of its resistance to knock, with higher octanes more resistant to knock.  Petrol engines work by compressing air and fuel, then igniting the mixture with a spark. Certain engine conditions can cause all or part of the mixture to ignite on its own without the spark, creating what’s called “knock” in your engine. Fuels can be blended to meet different octane ratings at the refinery or fuel terminal.

The majority of today’s petrol vehicles are designed to run on regular octane fuel (95). However, using higher octane fuel than the minimum required can benefit fuel economy, power and acceleration even in vehicles calling for regular fuel. Engine design features like higher compression ratios and forced air induction (e.g. turbochargers or superchargers) can make engines more responsive to octane.  The benefits achievable with higher octane depend not only on hardware design but also on the car’s calibration and the user’s driving style.