I own a crown Vic and have often wondered about this in the event o a car jacking or a similar situation. I have a 3500lb weapon, why bother drawing lol.
The curb weight of a Crown VicPolice Interceptor, including tools, gear and driver will be around 4400 pounds (I saw that on crownvic.net). There are 437.5 grains in an ounce, so doing the math it comes to 30,800,000 grains. Give or take.