Nowadays biodiesel which is an alternate fuel, is produced from easily available resources like virgin or used vegetable oils, both edible and non-edible. Without any further changes it can be used in compression-ignition (diesel) engines. There is a big demand to produce bio diesel in India and supply of this oil is becoming necessary. Indian plants like Jatropha (Jatrophacurcas), Mahua (MadhucaIndica), Karanja (Pongamiapinnata) and Neem (Melliaazadirachta) contain some percentage of oil in its seed, fruit or nut. In India, as edible oils are less in supply, non-edible seeds of karanja, Jatropha, Mahua and Neem are found as the sources of neat vegetable oil and biodiesel. Plant species, which has a certain amount of oil in their seeds or kernel, have been identified. The outer part of cashew nut contains a honey comb network of cells containing a viscous liquid called cashew nut shell liquid (CNSL). This liquid is obtained from the shell of a cashew nut. Almost 30-35% of CNSL which is present in the shell, can be used as an alternate fuel for CI Engines. © 2017 Elsevier B.V., All rights reserved.