This is a construction machinery transmission oil developed using superior quality base oils and additives for heavy-duty construction machinery operating in harsh conditions. Thanks to the new generation additives used, it minimizes rust and corrosion formation on gear surfaces, preventing pitting and erosion. It can be safely used in transmission systems, oil-bath disc brakes, clutches and gear groups of heavy-duty construction machinery operating in harsh conditions, in both old and new model machines. It minimizes friction in gear groups operating under varying speed and load conditions, ensuring quiet operation. It extends gear life.