Biodiesel is a renewable fuel, which is produced from vegetable oils, usually sunflower oil, soya oil, rape seed oil, etc. It can also be produced from used cooking oil and animal fats. Its physical chemical characteristics are similar to those of mineral diesel.
It can be used in diesel engines, either mixed with mineral diesel in various quantities, or by itself. If biodiesel is to be used by itself, small changes are required in some diesel engines, such as the replacement of elastomers (pipes, etc), mainly in those manufactured before 1990.
