PETROL OCTANE RATINGS
When you fill up your bike you generally get the choice of 95 or 97 fuel. These numbers are the fuelõs octane rating, which is shown in the industry standard of RON, which stands for Research Octane Number. This number is a figure demonstrating how much compression the fuel can withstand before it ignites. High performance engines generally have high compression ratios and that means running a fuel with a low RON figure could lead to pre-ignition (also called detonation or knocking), which robs the motor of power and can potentially cause damage, although modern motors automatically alter the ignition timing Ð within a range of parameters Ð to prevent damage occurring. The higher the RON number, the more compression the fuel can withstand before igniting and that means high performance engines can run at their maximum efficiency, and therefore make more power. Running high octane fuel in a low compression engine is of no real benefit at all and costs more than a lower octane fuel.