Premium Synthetic SAE 20W-50 by its optimized formulation provides lowered fuel and oil consumption. Because of its extended viscosity range the all seasons use is possible. A special booster raises the quality level up to API SN, which provides improved oxidation resistance, improved deposit protection, better wear protection, and better low-temperature performance over the life of the oil. This leads to an improved motor cleanliness and at least to an extended motor life.