Yaw angles in a car's real environment are for 80% of the time different from zero. The reduction of car emissions is one of the significant challenges among automotive companies, including the PSA Group. Hence, the interest in studying solutions that can adapt to the environment around the vehicle increases. Our work shows the interest in having mobile aerodynamic devices concerning the vehicle's speed/yaw condition. We observe a drag reduction of around 1%, which is remarkable on a vehicle's scale. Besides, we would also like to build a database to prepare a doctoral thesis, in which, eventually, we will be able to implement the identified solutions on a production vehicle.