Vegetable oils

Castor oil, lower cost than many candidates. Kinematic viscosity may be an issue. Coconut oil (copra oil), promising for local use in places that produce coconuts.Colza oil, from Brassica rapa, var. oleifera (turnip) is closely related to rapeseed (or canola) oil. It is a major source of biodiesel in Germany.Corn oil, appealing because of the abundance of maize as a crop.Cottonseed oil, the subject of study for cost-effectiveness as a biodiesel feedstock. False flax oil, from Camelina sativa, used in Europe in oil lamps until the 18th century.Hemp oil, relatively low in emissions. Production is problematic in some countries because of its association with marijuana.Mustard oil, shown to be comparable to Canola oil as a biofuel.Palm oil, very popular for biofuel, but the environmental impact from growing large quantities of oil palms has recently called the use of palm oil into question.Peanut oil, used in one of the first demonstrations of the Diesel engine in 1900. Radish oil. Wild radish contains up to 48% oil, making it appealing as a fuel.