Problem with large cities was the tens of thousands of walking dead as was shown in Atlanta.... If anything happened in real life close to this as in epidemic and anarchy I would head for the boonies so as to have smaller groups to deal with.yea I guess 3 years can do allot to standing gas & Batteries
Gas may eventually be a problem. I would think there would be enough cars sitting around
to help yourself to. at least in the larger cities & in Garages.
Quality of sitting gas may be a problem after awhile with the crap they put in it.
Standard Transmissions & older cars (60's & early '70's ) can all be started without a battery.
Then as long as the chargers work they should be good to go.
if they can save the fuel systems