Partial combustion of biomass in the gasifier generates producer gas that can be used as supplementary or sole fuel for internal
combustion engines. Dual fuel mode operation using coir-pith derived producer gas and rubber seed oil as pilot fuel was analyzed for
various producer gas–air flow ratios and at different load conditions. The engine is experimentally optimized with respect to maximum
pilot fuel savings in the dual fuel mode operation. The performance and emission characteristics of the dual fuel engine are compared
with that of diesel engine at different load conditions. Specific energy consumption in the dual-fuel mode of operation with oil-coir-pith
operation is found to be in the higher side at all load conditions. Exhaust emission was found to be higher in the case of dual fuel mode of
operation as compared to neat diesel/oil operation. Engine performance characteristics are inferior in fully renewable fueled engine
operation but it suitable for stationary engine application, particularly power generation.