hello, i’ve follow some solutions, like dr. Bradley suggest but every solutions fails to modern cars, modern cars have so many gaps and electronics, for example almost any car from 15 years ago have a key module fo security reasons, the key have a code (chip) that if the key module of the car do not recognise i can’t start up my car, so finally i gave up to use my car as bug out vehicle, i’ve used my motorcycle in other emergency situations like earthquake in 2017 in mexico city and somentimes is the only vehicle that can move around streets with fallen buildings, and i can push it over a car, since its a lightweight just 140kg, hope my recomendation works for someone else and just have some peace of mind, by the way the motorcycle has to be carburated and use cdi ignition , just keep 2 or 3 cdi units and ignition coils in a faraday cage, my 150cc motorcycle give a good fuel mileage in my case around 70mpg and i’ve done long trips on it, maybe its not the best option but its better than been stranded…. see ya! if someone need a recomendation of some motorcycle, feel free to text me 🙂