Axle transmissions require particularly high wear protection (AW) and extreme pressure properties (EP). This is only possible with highly concentrated sulfur additives, which is why axle oils are not suitable for clutches or synchronization. In addition to high wear protection, axle drive oils must have good aging properties. Here, too, longer intervals between replacement and fill-for-life have to be achieved. With stricter directives and regulations concerning emmisions , the axle oils are getting more and more focussed for the efficiency optimization of the drivetrain.