Biodiesel has combustion properties very similar to mineral diesel and can replace it in most uses. Less toxic than table salt and as biodegradable as sugar, biodiesel is most often used blended with mineral diesel. It is one of the main candidates to replace fossil fuels as the world's primary transport energy source because it is a renewable, clean-burning fuel that can deliver benefits both to the environment and to vehicle engines.

Pure Fuels only sell B100 - 100% biodiesel made only from waste cooking oil. We do recommend using it in a blend of between 50 and 90% - this has the advantage of taking the thinking out of using the fuel and extending existing fossil fuel reserves.

Biodiesel can be produced from an array of used cooking oils through a double transesterification process. Methanol, used in conjunction with an appropriate catalyst under controlled conditions allows the oil-based material to be transesterified to a fatty acid methyl ester (FAME). Transesterification basically sees the substitution of methanol (a monohydric alcohol) for triglycerides. The FAME then undergoes a series of washing steps before finally being distilled to produce biodiesel. Pure Fuel's plant recycles used cooking oil, which is a by-product of the food industry, to produce biodiesel.