Due to an increase in industrialization and urbanization, there is a rapid decrease in conventional fuels. The price of conventional fuels is going on increasing day to day and also increasing environmental pollution due to more usage. If this goes on there will be no longer the conventional fuels. There is a need to search for alternative fuels for automobile applications. Environmental degradations and depletion of oil reserves are matters of great concern around the globe. Developing countries like India depends heavily on crude oil import of aroud125 mt per annum. Diesel being the main transportation in India finding a suitable fuel alternative to diesel is an urgent need. The projects are aimed to investigate the performance and emission characteristics of a diesel engine at various loads fuelled with various blends. The experiments are conducted on the widely used diesel engine without the design modifications. The projects compare the performance characteristics such as Brake Thermal Efficiency (BTE), Mechanical Efficiency (ME) and emission characteristics such as CO2, NOX, HC, CO emissions of the blends to that