This book on "Performance Assessment of Diesel Engine using Emulsion Fuel" has been written to meet exhaustively the requirements of diesel engine research using emulsion fuel. The contents presented in the chapters comprehensively detailed the combustion, performance and emission characteristics of a diesel engine running with emulsion fuel and nano-additive. In addition, optimization of engine operating parameters to obtain better performance and emissions level are also in detailed. Salient features: The presentation of the research matter is systematic and the language in the text is in an articulate and easy to understand Each chapter is discussed with much-needed references supported by neat and self-explanatory diagrams Detailed procedure to calculate the error and uncertainty percentage of measuring instruments and parameters are included in Appendix.