AdBlue is the same as truck DEF, which can be purchased at most auto supply stores and fuel stations. In my experience, pretty much every car that comes with an

AdBlue is the same as truck DEF, which can be purchased at most auto supply stores and fuel stations. In my experience, pretty much every car that comes with an urea system can be refilled by the user. That makes sense--it's not like you can make emissions worse by filling up the tank.