Car Storage for 6 months

We used to have a car in Zihua. We hooked it up to a trickle charger to keep the battery alive and put some gasoline preservative into the tank and parked it in the garage. Nevertheless, upon our return, the first time we tried to drive it, the injectors would clog and we had to have it towed to get fixed. We sold it and just take cabs. No worries about parking and crazy drivers and you can enjoy the view enroute.