By evaluating the technical viability and projecting biodiesel and ethanol as prospective alternate fuels, the emphasis is placed on realising the global goal of looking for alternative fuels to have energy security. The current mild steel engine has been updated, as described, to provide effective output with dual fuel. The summary of the suggested alterations and performance improvements are examined based on the study of experimental findings and literature review. A direct injection (DI) low-speed diesel engine with a rated output of 3.5 kW when fueled with diesel fuel was used for the experiment. During the experiment, the DI diesel engine was first run in single and dual fuel modes with diesel/biodiesel at 0 %, 50 %, and 100 % of the rated load and 10 %, 20 %, and 30 % of ethanol as the primary fuel. The lab contained all of the technological parameters. In the studies, it was discovered that for all fuel combinations, the peak heat release decreased with dilution and increased with load. Dual fuel mode combustion had somewhat greater ignition delays for both diesel and biodiesel than single fuel mode combustion. Because neat diesel ignites more quickly than biodiesel with ethanol, it releases more heat at its peak, making engines with copper-coated pistons and engine heads safer.