For Diesel Engines with SCR technology (Selective Catalytic Reduction). Remove the spout and screw onto the bottle neck. Insert spout into Adblue Tank and fill until tank is full. If Adblue comes into contact with the vehicle's paintwork, wipe off and rinse the area with water. DO NOT ADD TO FUEL TANK. PureBlue is a licensed Adblue product and meets requirement of ISO 22241-1 and DIN 70070.