Diesel Systempflege, diesel system protection. Properties. It protects fuel supply systems and fuel piping (especially for Common-Rail systems) from wear, corrosion and deposits. It increases lubricating properties of diesel fuel. It protects from water presence in diesel fuel. It prevents early failure of fuel valves. It’s recommended for KIA. Application. For all diesel cars with Common-Rail fuel supply system. Add the additive in the amount of 250 ml for maximum 70 liters of diesel fuel. Use each 2000 km.