BIZOL Truck Primary 15W-40 is a modern low viscosity, universal motor oil for use in all diesel engines, under any kind of operating and weather conditions (year-round oil). It surpasses the highest requirements of modern diesel engines that are currently demanded from motor oils. The advanced additive technology enhances wear protection and enables maximum oil change intervals. The ideal lubricant for all diesel engines, with or without catalytic converter and turbochargers. In case of extended oil change intervals the instructions of the vehicle manufacturer are to be followed.