Actually, in most states, property(car, money etc) is exempt from use of lethal force unless the person is also threatening you with lethal force to take it.
You cannot use lethal force to protect your property only your person or another bystander.
So if someone just takes off with your car you cannot shoot them.
If they point a weapon at you as in a car jacking, some states allow you to use lethal force to protect your life, not your car.
The only exemption to this exemption is INSIDE YOUR HOME
known as the castle doctrine in most states.
It states that you do not need to retreat but can use lethal force to protect yourself in your house.