This is a semi synthetic heavy duty engine oil that has been officially qualified as LONG DRAIN in the UHPD (Ultra High Performance Diesel) category. This product can be used in supercharged diesel engines that operate under all service conditions and in all seasons of the year. One of the typical properties of this product is that it helps to protect the turbocharger by cooling and lubricating the bearings. This product provides very long drain intervals and provides excellent engine cleanliness. This is a perfect HD engine oil for vehicles that are used daily. Due to the high ash content, this oil is not suitable for gasoline engines and vehicles equipped with a particulate filter.