Penrite Octane Booster, 375ml. RRP $17.99. Provides maximum protection against valve seat recession and suitable for unleaded and Ethanol E10 based fuels. Octane Booster is a fuel treatment designed to enhance the octane rating of regular 91 (RON) unleaded octane petrol. It is formulated to increase the octane rating by up to 2.5 when used at a ratio of 375ml per 50 litres of petrol. Its unique formulation improves power & acceleration, enhances fuel economy, prevents engine detonation damage, reduces "pinging" with low octane fuel and provides protection against valve seat recession. It will also keep injectors clean for optimum performance and economy. See Penrite site (www.penriteoil.com.au) for MSDS and specifications.