Nulon Octane Boost & Clean stops (OBC) engine pinging (detonation) by instantly boosting the octane rating of all types of petrol. Its strong cleaning action physically removes the carbon deposits that are a major cause of pinging. Your car will regain lost performance, start more easily and run more smoothly. Nulon Octane Boost & Clean softens and dissolves fuel injector and combustion chamber carbon deposits, which are a major cause of poor performance, rough running and engine detonation (pinging). Using Octane Boost & Clean as a regular maintenance product will ensure your vehicle regains lost performance, starts easier and runs smoother. Safe for all unleaded fuels (including E10 & E85 bio-fuel).