“A full synthetic manual transmission lubricant developed for use in synchronised and non-synchronised transmissions in long haul trucks, b-double road train and other severe duty applications. Transmax Manual Heavy Duty 75W-90 is approved against Volvo’s most demanding Heavy Duty Manual Transmission specification enabling extended oil drain intervals (400k kms) in severe duty manual and automated manual (i-Shift) transmission applications. It is also suitable for us in manual transmissions of cars or light commercial vehicles where GL-4 oils are recommend.”