ADVANTAGE Catalytic Converter and Fuel System Cleaner for petrol and petrol hybrid engines optimizes the efficiency of the catalytic converter and ensures the optimal working of the lambda (oxygen) sensors.Optimizes the efficiency of the catalytic converter.Ensure optimal working of the lambda (oxygen) sensors.Improves cleanliness and reduces emissions.Restores engine performance.Especially suited for city driving cycles.ApplicationsRecommended for all petrol and petrol hybrid engines.DirectionsAdd 1 bottle of 450 ml to up to 50 litres of fuel.Bottle snout extender (provided) also suitable for capless fuel fillers.