When the world which we live in is looming with a severe energy crisis in the near future with perennial rise in petroleum price and depleting state of fossil fuel resources that may lead us to devastating consequences affecting the global economy, there is a need to study and discover home grown biodiesel that can fulfill our energy needs. Biodiesel obtained from vegetable oils are considered to be a promising alternate fuel. Last ten years, several researchers have been analyzed single biodiesel blends experimentally while researches on a combination of two different bio-fuel blends with diesel which have a larger scope is very little. The present study was taken up with two bio-fuels from Pine oil and Palm oil was analyzed at various ratios mixed with diesel. The effects of pine and palm oil bio-fuel were examined in an engine and the CO, HC, NO<inf>x</inf>and smoke opacity were also investigated. During the investigation it was observed that the brake thermal efficiency of biodiesel blends to be higher than diesel. Dual biodiesel blends were found to be suitable to conventional diesel fuel in all aspects such as emissions and performance. Further, from the investigation it was seen in blend C there has been a reduction of 26.6% in the fuel consumption while there has also been a reduction of 69%, 19% and 15.9% in HC, CO and smoke respectively and at the same time there has been an increase of 7 % of the oxides of nitrogen. © 2018 Elsevier B.V., All rights reserved.