Cleanburn Fuels Ltd manufactures Cleanburn in Turua, New Zealand and is proud to say Cleanburn is Made in New Zealand. What is Cleanburn: Cleanburn is a 100% hydrocarbon based liquid fuel treatment that assumes the characteristics of the fuel that it is treating. Simply, Cleanburn is a liquid fuel catalyst that treats petrol (leaded, unleaded and low sulphur) , diesel, kerosene and heating oil. How does Cleanburn work: Cleanburn treats the fuel pre-combustion, so as combustion takes place Cleanburn allows more of the carbon to be burnt, giving more of a complete burn of the carbon. Carbon creates the power, which is the fuel saving and less carbon deposits are emitted from the exhaust, reducing CO, CO2, Nox, Sox and Smoke Opacity.