Vegetable oils have good tribological and viscosity properties together with excellent biodegradability and non-toxicity. Unfortunately there wider use is restricted by pure oxidation stability. Durability of vegetable oil based lubricants depends mainly on oxidation. This problem was analysed in many research works. Nevertheless scientists agree, that still remain many unanswered questions in this field. In the preset study the sage and thyme extracts and attars are suggested to use them as antioxidants in rapeseed oil. Natural antioxidant influence on oxidation stability, kinematic viscosity and tribological properties of rapeseed oil was measured. The studied sage and thyme extracts showed good oxidation stabilisation properties and has no negative influence on tribological properties of rapeseed oil.
