Diesel engines are the main source of transportation, power generation and agricultural applications and etc. But due to fast depletion of world petroleum reserves and the impact of environmental pollution, there is an urgent need to search for suitable alternate fuels for diesel engines. The main alternative fuel sources are vegetable oil, biomass and alcohols. Biodiesel derived from vegetable oils is one of the attractive alternative fuels for diesel fuels as they are renewable, domestically grown producing low emissions. Biodiesel can be used in the existing engine without any modifications. Biodiesel is made entirely from vegetable sources, it does not contain any sulfur, aromatic hydrocarbons, metals or crude oil residues. Biodiesel is an oxygenated fuel, emissions of carbon monoxide and soot tend to reduce. The use of biodiesel can extend the life of diesel engines because it is more lubricating than petroleum diesel fuel. The objective of this project is to get a better knowledge about the various vegetable oils which are available in the market and to have a detailed idea to do some experimental work in the future. © 2017 Elsevier B.V., All rights reserved.