Nulon Ethanol Fuel Treatment is specifically designed to provide fuel system protection for vehicles using E10 and E85 fuels. This product prevents and inhibits rust and corrosion in the fuel tank, fuel lines and combustion chamber while keeping injectors clean for optimal engine performance. The advanced additive technology also stabilises ethanol fuel keeping it fresh for up to 12 months. Directions for Use: For best results add one bottle of Nulon Ethanol Fuel Treatment to 60 litres of fuel (5ml/L) prior to, or after, filling, every 5,000km. For ongoing maintenance and corrosion protection add 300ml for up to 60 litres of fuel, or 5ml per litre of fuel.