Abstract: Diesel is a main source of fuel among petroleum product but ecological degradation and exhaustion of petroleum reserves are matters of great concern around the world. Finding a suitable fuel alternative to diesel is an urgent need. Comprehensive studies were carried out as an alternative fuel. In this perspective, alternative oxygenated-diesel fuel blends are currently receiving renewed interest. For this context, the use of Oxygenated Bio-Fuels (OBF) like ethanol, methanol, Dimethyl Ether (DME) and bio-diesel in combination with diesel is an effective measure to substitute renewable fuels and reduce Particulate Matter (PM) from in-use diesel compression-ignition engines. Additionally the study is specific to diesel fuel blends; like ethanol-diesel, bio diesel-diesel, gaseous fuel-diesel and oxygenated fuel-diesel blend and their feasibilities as an alternative for diesel fuel.