petrol ICE cars would only be usable for a year or so The Internet really overstates this. Fuel injected systems are sealed. Carbureted systems are open to o

petrol ICE cars would only be usable for a year or so The Internet really overstates this. Fuel injected systems are sealed. Carbureted systems are open to outside air, so the fuel is constantly evaporating, leaving residue behind, and absorbing moisture from the atmosphere. Gasoline in a sealed container remains usable for far longer than people on the Internet say it will. Anyway, the final state of an apocalypse car would be running on wood gas. North Korea runs some or all of their military trucks on it (this may have changed as they've increased relations with Russia). An episode of Car Talk explained how it was used by German civilians during WWII: https://www.cartalk.com/radio/show/1201-20-miles-wood-chip https://www.cartalk.com/radio/show/1201-20-miles-wood-chip