When you are being chased by enemies in a car, let them drive up on your 
side. Usually they will
come up near your rear on your left or right. Then, look ahead and lure them 
into an accident.
Usually they will smash into something like oncoming traffic or a wall if 
timed correctly. They will
eventually come back and catch up to you, but if you keep doing this they 
will eventually blow
themselves up (because you cannot shoot out your car at them).