[BikerModder]

Smart car has a Scoop for the engine that you know.It comes from the side. If you air scoop through the intake through the engine you'll get free flowing air to the throttle body. There is a lot of vacuum from the highway. While driving at speed and while sitting at a proper idle or reving.Dust gets stirred and picked up and all over the engine and through the breather. Maybe a Smart mod. So I guess. No one is gonna dump dirt down your air breather. I have a Miata but it is 1st year or 1st gen. So I don't know I drive both when I want mileage.