My car seems to do whatever it wants on the highway. It moves all over the place left to right needing constant steering corrections. It doesn't feel very stable and I am unconfident driving it. Brought it to the dealer a few times and they say everything is fine. Does anyone have any ideas or experience the same symptoms? It also seems to catch the grooves in the road and ruthlessly folow them all. The tires are stock 205/60/15's, and the air pressure is always set to 29 front, 29 rear.