This 20ml bottle treats 100 Liters of fuel. Suitable for one full tank on a small van, truck or larger car. This 20ml bottle treats 100 Liters of fuel. Suitable for one full tank on a small van, truck or larger car. Fuel treatment for the 21st century Independent tests performed on a number of engines around the world have confirmed that Oxytane has a dramatic and positive effect on engine fuel economy, emissions and performance. Improves performance Improves fuel economy Reduces engine noise Reduces engine vibration Reduces toxic emissions Improves engine life Reduces carbon deposition in the combustion chamber