Here is the Fort Zancudo Tank.
Here is the Tank you can buy.
What I want to know now is have any of you noticed a difference in how long the tank will last on a 5 star wanted level? I extensively test out my vehicles to see how long I can last on a daily basis, one of the most fun things to do after 100% completion and been doing this since GTA III. The FZ Tank has those side panels and the purchased tank does not. I am wondering if having those side panels helps the tank's lifespan before it catches fire and blows up. I know the purchased tank is pretty bad and blows up on you within 15-25 minutes on a 5 star chase. It physically can't last longer. This is with rolling over NO vehicles, too. The only possible way to last as long as you want is by camping out under the hanger, but that gets boring very quickly.
So does the FZ tank last longer than the one you can buy? Anybody test this out?