Abstract In this research, bio-lubricant was produced from castor oil in two stage processes where methyl ester of the oil was produced by esterification and then transesterified using homogenous catalyst (NaOH). It was then blended with 15w/w% of Sodium Lauryl Sulphate (SLS) to produce bio-lubricant. By varying the amount of homogenous catalyst (1.0-1.2 w/w %), three (3) different grades of bio-lubricant samples were produced and subjected to physical and chemical test to determine their characteristics. The three grades of the bio-lubricant samples weighs 88.76g, 125.23g and 162.61g respectively with varying degrees of kinematic viscosity of 89.68, 67.24 and 58.01cst respectively at 40°C, and 8.14, 7.92 and 7.59cst respectively at 100°C. The viscosity indexes of the three samples are; 32, 78 and 91, pour points are −21, −18 and −18°C, and the flash points are 215, 211 and 223°C respectively for each of the samples. The properties of the biolubricant samples indicates that they can be used under wide range temperatures. Our results are comparable with mineral based lubricant standards of Motorlube (SAE 20W40).