Semi-Synthetic Engine oils are more reliable for engines and Motul brings Motul 3100 Gold 20W50 Semi-Synthetic Engine Oil with Ester-Technology for ultimate protection of the engine and increase performance. Motul is one of the leading engine oil brands for the last 150 years. In city traffic, engines are getting more stop-start cycles and Semi-Synthetic lubricant is an ideal oil for standard motorbikes and its high oil performance reliability helps to protect and clean engines and prolong their life.