Increased MW power requires a larger, efficient, high-performance transmission. The main gears in wind turbines must perform daily at their highest and function maintenance-free for the longest possible period. Unpredictable operating conditions such as sudden changes in load and temperature, humidity as well as highly dynamic loads are only a few factors effecting performance and service life of the main transmission. Repair and maintenance costs in approx. 100 meter height are complex and costly, should a problem occur. The selection of the appropriate lubricant increases operational availability as well as transmission efficiency and enables cost savings. LUBCON gear lubricants are specifically tailored to the technical characteristics of wind turbines, withstand maximum loads, extend maintenance intervals as well as generator service life and preserve simultaneously performance capacity.