Performance Evaluation of Single Cylinder Diesel Engine using Neem Caster Bio-diesel

India was the fourth-largest consumer and net importer of crude oil and petroleum merchandises in the world after the United States, China, and Japan. India's petroleum product mandate reached nearly 3.7 million barrels per day (mbl/d), far above the country's approximately 1 million mbl/d of total liquids production. Most of India's claim is for motor gasoline and gasoil, fuels used mainly in the transportation and industrial sectors, and for kerosene and LPG in the residential and marketable sectors. Consumers receive large subsidies for retail purchases of diesel, LPG, and kerosene, placing upward pressure on overall oil demand. Insufficient investment in evolving more crude oil and liquids production has caused production to grow at a slower rate than oil demand.As there is an increase in the intake of the fossil fuels, their decrease in amounts are also increasing rapidly. Bio-Diesel as an Alternative Fuel from neem-castor oil is a promising resort to overcome lion’s share of diesel. The diminishing of fossil fuel resources and the environmental degradation have stimulated research interest to find superior renewable alternative energy sources. Bio-fuels appear to be a solution to substitute fossil fuels, because resources for it will not extinct. Biodiesel is the fatty acid alkyl ester. Biodiesel be produced from low cost Neem seed oil using Trans esterification. This review has been taken up for identifying the effects of blending Neem Seed oil with diesel on engine and performance and emissions of CI engine.