“People buy this product because they need a universal synthetic based GL-5 Gear Oil” This is a synthetic-based GL-5 manual transmission gear oil that is known for its wide and universal use. This product can be used in all gearboxes, transfer boxes, and differentials of trucks and 4-wheel drives. This manual gear oil is suitable for synchronized gearboxes as well as heavily loaded differentials. It performs very well in severe conditions. This product contains effective anti-scuffing additives and can be used for hypoid gears that have a significant displacement of axes. This product operates under various combinations of high-speed/shock load and low-speed/high-torque conditions. This product can be used in applications where GL-4 is prescribed.