Frankol GL-4 75W-90 is fully synthetic high-performance gear oil is a top grade, extreme pressure gear oil for high-load manual, auxiliary, transaxle and hypoid transmissions, where a lubricant complying with API GL4 is required. High-quality, oil and modern additive technology ensures a broad application range and optimum transmission lubrication under conditions. The low-viscosity characteristics of this gear oil makes it also suitable where shifting difficulties exist (e.g. stiffness or noise generation).