Our fuel engineers spend hours and hours testing different ingredients and formulas, because they know the smallest change can make a difference. Like the molecules in our regular Synergy petrol that have been specially designed to help clean vital parts of your engine (like your car’s intake valves) and help look after your engine. You may have heard that nasty engine deposits can build up in your engine over time which prevent your car from performing at its best and can reduce your fuel economy.*
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.*