SAVE £15.90 when buying 10 bottles . Millers Diesel Power Eco Max is a high specification diesel fuel treatment for enhanced combustion efficiency and engine cleanliness, now with improved detergency. It increases power and mpg, reduces emissions and cleans injectors and piston crowns, giving easier starting, quieter and smoother running. Increases Cetane by up to 4 numbers. Each bottle treats up to 10 tanks of fuel and is suitable for all diesel engines, including those with particulate filters. May also be used at double strength for additional performance.