Biodiesel is manufactured from renewable feedstock, which is animal or vegetable based, via a catalytic reaction known as transesterification.

Petroleum diesel is a complex mixture of hydrocarbon molecules derived from petroleum crude oil extracted from natural sources that has taken million of years to form and of which there is a limited and diminishing supply.

Biodiesel contains no petroleum, but it can be blended at any level with petroleum diesel to create a Biodiesel blend. It can be used in compression-ignition (diesel) engines with little or no modifications.