MAXXRON 15W-40 Turbo Power Diesel Engine Oil is a synthetic blend of high quality, specially designed to offer a great and efficient performance. It carries the API CI-4/SL certification and is made to optimize the safety of turbo diesel engines of trucks and other vehicles used in commercial applications. The improved formula guarantees the highest purity, less wear of the engine in severe conditions, and, furthermore, engine longevity. A more convenient 5-liter pack is what you get with MAXXRON, always ISO 9001:2015 certified for dependable engine protection.