Millers Petrol Power Eco Max addtive 1 Shot boost for both catalyst and non-catalyst vehicles. Add the bottle contents to 50 litres of unleaded petrol for catalyst equipped vehicles. Vehicles without catalytic converters may safely increase the concentration to 1 bottle to 25 litres of unleaded petrol. Enhances performance by increasing octane values typically by 1.6. Reduces pinking and possibility of pre-ignition and detonation by controlling the flame front . Improves fuel consumption and gives smoother running.