“People buy this product because they need an extreme pressure GL-4 manual gear oil” This is a high-quality mineral gear oil that has been specifically developed for extreme pressure circumstances and meets the GL-4 specification. The anti-friction additive packages that are used in this product ensure easy shifting. This product is specifically developed to avoid corrosion of copper alloys and can be used in synchromesh gearboxes, transfer boxes, mechanical steering controls, and most rear axles. The anti-wear properties of this product ensure long transmission life.