The present paper elaborates the emission characteristics of coconut shell regarding maximum diesel saving and lower emissions on a dual-fuel engine. The test blends were examined in dual-fuel mode with variable gas flow rates, and are contrasted with fossil diesel at diverse loading conditions. The results inferred that the highest diesel saving of up to 80% occurs at 8 kW load. Likewise, nitric oxide diminishes; however, carbon monoxide and hydrocarbon increase gradually for all test fuels without any engine issue in the dual-fuel mode. It was finally concluded that coconut shell producer gas presents a very promising alternative fuel to diesel since it is renewable and a clean burning fuel having similar properties to that of diesel.