Semi-synthetic lubricant for super high performance diesel (SHPD) engines operating in rather stressful conditions. Stable viscosity lubricant offering effective control in piston cleanliness and cylinder polishing. Recommended for high performance diesel engines meeting Euro I, Euro II, Euro III, Euro IV and Euro V emission specifications and operating under hard conditions, e.g. long replacement intervals, according to manufacturer recommendations. Suitable for engines without particulate filters, most EGR engines and most engines equipped with SCR NOx reduction systems. However, recommendations may vary among engine manufacturers. Thus, in case of doubt, please consult manufacturer and/or retailer manuals. They are suitable for a large variety of applications and most truck, bus and light professional vehicle brands, rendering it an ideal choice for use in mixed vehicle fleet.