Originally Posted by rappo
Yeah I've found that guns don't really do too much damage to vehicles. When a story mode mission calls for vehicle destruction, you gotta use a grenade, sticky bomb, or fuel to do it without wasting too much ammo. I haven't had to destroy a vehicle in GTA: Online but I imagine it's difficult when you just have a few select guns to choose from...
Gas tank works indeed but using a shotgun on the front (engine) does the trick too, doesnt take too many shots