Biodiesel from Baobab seed oil was produce using transesterification reaction. The blends ratios were as follow; B20 (20% biodiesel, 80% diesel) B20E20 (20%biodiesel, 20%Ethanol, 60%diesel) and B20E30 (20%biodiesel, 30%Ethanol, 50%diesel). Biodiesel, B20, B20E20, and B20E30 had the following physicochemical properties: Density at 15°C g/cm³ (0.8866, 0.8519, 0.8403, and 0.8864 g/cm³ respectively), Kinematic viscosity in 40°C (5.8, 3.6, 3.4, and 2.7 cSt respectively), total Acid Number mgKOH/g (0.20, 0.16, 0.14, and 0.13), Calorific value (44.051, 44.354, 44.456, and 44.5 MJ kg -1 respectively), Cloud point (+7, +12, +8, and +8 °C), Pour point (+6, -6, -8,and-12°C), flash point was 80 for biodiesel and 67 for B20 Water Content wt% (0.1, 0.05, 0.056, and 0.048) Copper Strip Corrosion 3 Hours at 100^oC ( 1b, 1a, 1a, and1a). The experimental results of emissions in diesel engine at different speeds for standard diesel and blends showed that the carbon dioxide and NO_X emissions decrease when blends used over diesel. B20 (20% biodiesel and 80% diesel) showed lowest emissions levels.