Purpose - The purpose of this paper is to investigate alternatives for four stroke 10w40 motorcycle engine oils. Today, mineral and synthetic-based lubricants are widely used but because of ecological aspects, which are gaining in importance nowadays and limited resources of mineral oils, environmentally-friendly biobased lubricants are gaining in importance. Biobased lubricants are also important for using national resources rather than importing crude oils which are limited. The main consumption of lubricant market is motor oils. In this study, starting from mineral, synthetic and biobased lubricants; mineral, synthetic, biomineral and biosynthetic based four stroke motorcycle engine oils (10w40) are prepared, then lubricity properties of the motor oils are determined.