Nice shots, though many looked "posed". I'd guess that driving and shooting by yourself would mandate "posed" most of the time.

I you want to try another setting...put your camera on -A- (aperture) setting. That way, YOU choose the f-stop ...chosen by evaluation of your lighting conditions..and the camera will choose the fastest shutter speed it can use. That is good for stop-action shots.

If you want to give a feeling of motion, then you will need someone to drive the car and you can "pan" long with it, shooting in any setting. regards, Rich