Diesel Schmier-Additiv lubricating additive for diesel systems. Properties. The diesel fuel injection system must be lubricated by diesel fuel. When low-sulfur fuel is used, there are problems with lubrication. This additive efficiently lubricates the injection system, protects it from wear and from early malfunction. It improves performance and extends the service life of the injection system. Application. For all grades of diesel fuel with low and standard sulfur content. Add prior to or right after fueling, follow the proportion of 150 ml of the additive for 80 liters of diesel fuel.