• Octane is an attribute all unleaded fuels have, measured by a Research Octane Number (or RON).
• Lower-octane fuels can result in a spontaneous ignition of the fuel-air mix called ‘engine knock’.
• Engine knock causes the engine to adjust the timing of the spark plug, in order to prioritise protecting itself from damaging over performance.
• Higher-octane fuels can stand more compression before automatically combusting.
• New Shell V-Power unleaded is a 99RON octane fuel.
• By comparison, regular Shell unleaded is 95RON.
• New Shell V-Power unleaded -the power of high octane.₁₂

Watch the video below which explains what Octane is

₁₂ Shell V-Power unleaded with 99 RON. Compared to Shell's regular Maingrade unleaded fuel. Effective in octane responsive vehicles only. No guarantees provided. See shell.co.uk/vpower for more information