For lubricating diesel fuel systems in passenger cars and trucks. Prevents Deposits In The Combustion Chamber And Injection System. The Function Enhancer Increases The Lubricating Effect Of Low Sulfur Fuel, Thus Prevents Surface Friction.Compatible with all modern diesel oxidation catalytic converters. Free from sulphur, phosphourus ,metals and acids. For all diesel engines with common rail and pump nozzle technology. 250ml is sufficient for 40 to 50 ltrs of Diesel.