Silverhook Diesel Treatment is a multifunctional treatment that combines strong detergents and lubricants. Cleans deposits and keeps injectors and pistons clean. Provides superior lubrication when used with low sulphur diesel fuels preventing wear and premature failure of injector pumps and injectors. Reduces diesel knock, smooths idling and eliminates tough starting, whilst reducing emissions, black smoke and soot. Helps to improve fuel economy. One bottle treats 50-70 litres of fuel.