Sparesbox Blog

How does Octane Booster work?

By James Andrew

Wed Sep 30 2015

Octane Boosters simply raise the RON (Research Octane Number) of the fuel.


A conventional petrol engine relies on its ability to compress an air/fuel mixture inside the combustion chamber, to be ignited by the spark plugs at a very precise moment. Basic physics will tell you that the compression of the air/fuel mixture creates heat as the molecules speed up and kinetic energy becomes heat energy. The problem with this is if enough heat is created, it can cause the mixture to self-ignite. This is referred to as Pre-Ignition or “Pinging” in reference to the sound it makes. This is incredibly detrimental to an engine and is one of the quickest ways to shorten your engines life.


A cars potential for power output boils down simply to how much air it can compress into the smallest space possible. The measurement of this is referred to as a “compression ratio”. As the mixture is compressed more and more, the heat energy produced will increase exponentially, as does the potential for Pre-ignition.


The RON rating is a measurement of a fuels resistance to ignition. A 98RON fuel is less volatile than a 95RON fuel, and is harder to ignite. This makes it more ideal for performance focused or turbocharged engines that have high compression ratios or use a turbocharger to operate above 100% volumetric efficiency.


On the other hand, using a high RON fuel in a car that does not require it, means it wont burn the less Volatile fuel as completely and you will suffer poor economy and power.


An Octane Booster when added to a fuel, increases its RON. If you can hear a light inconsistent rapping or knocking from your engine when accelerating or under load, it may be due to the incorrect fuel being used and we would recommend Octane Booster as a quick remedy.


Will Octane Booster make my Car Faster?


A common misconception is that using an Octane Booster will make your car quicker. The simple answer is no, it will not. The only circumstance in which it will help your car go faster is if fuel with an inadequate RON was used in the first place.

Looking to improve the performance of your car? Check out our guide to Stage 1 Guide to Tuning your Car.


Octane Booster