Going through this very same topic. Blended petrols have a lifespan of about 3 months. diesels maybe 6 months. Theres one company doing stabilisers and refreshers but you need to keep adding them every 3 months or so. Fuel left stood turns into shellac, even in sealed containers. Its fine for heating but not running an engine on. Vegetable oil might by an option, it needs lye and methanol, which arent tricky to make. A drawback might be the shelf life of vegetable oil, I'd have to check on that. Fuel isnt an issue, there are plenty of Compressed Natural Gas vehicles about. As long as the containers are fine and dont corrode it doesnt really have a shelf life. There is plenty of natural gas around so its easy to obtain, and a biodigester, like Mad Max Beyond Thunderdome is feasible. Growing a biodiesel crop isnt really an option, it takes a lot of acreage to make fuel, and you need to be growing food. Batteries are an issue, modern rechargeables are ok for maybe 5 years. Lithium watch batteries are the best at 15 years, but so small. Old lead acid batteries are probably the most viable solution; they can be rebuilt. Solar panels generally have a viable lifespan of 10-15 years, their yield degrades rapidly. Wind turbines need a lot of maintenance, due to being so exposed to the elements. Steam, from gas, coal, biomass boilers, is a much better option. Plenty of small steam turbines in factories and they can run a few megawatts, Also worth looking at diesel electric trains, they use a diesel engine to drive a turbine to generate electric for the wheel motors. Tyres are the clincher. Current recommended life span for tyres is 6 years, from date of manufacture, thats stamped on the tyre. They oxidise so maybe vacuum packed, but I would think no more than double that. I'm looking into urethane andsynthetic tyres, but a lot use petroleum products and its how much crude oil is left, and can you refine it.

Going through this very same topic. Blended petrol have a lifespan of about 3 months. diesels maybe 6 months. There is one company doing stabilisers and refreshers but you need to keep adding them every 3 months or so. Fuel left stood turns into shellac, even in sealed containers. Its fine for heating but not running an engine on. Vegetable oil might by an option, it needs lye and methanol, which aren't tricky to make. A drawback might be the shelf life of vegetable oil, I'd have to check on that. Fuel ins't an issue, there are plenty of Compressed Natural Gas vehicles about. As long as the containers are fine and don't corrode it doesn't really have a shelf life. There is plenty of natural gas around so its easy to obtain, and a biodigester, like Mad Max Beyond Thunderdome is feasible. Growing a biodiesel crop isn't really an option, it takes a lot of acreage to make fuel, and you need to be growing food. Batteries are an issue, modern rechargeable are ok for maybe 5 years. Lithium watch batteries are the best at 15 years, but so small. Old lead acid batteries are probably the most viable solution; they can be rebuilt. Solar panels generally have a viable lifespan of 10-15 years, their yield degrades rapidly. Wind turbines need a lot of maintenance, due to being so exposed to the elements. Steam, from gas, coal, biomass boilers, is a much better option. Plenty of small steam turbines in factories and they can run a few megawatts, Also worth looking at diesel electric trains, they use a diesel engine to drive a turbine to generate electric for the wheel motors. Tyres are the clincher. Current recommended life span for tires is 6 years, from date of manufacture, that's stamped on the tyre. They oxidise so maybe vacuum packed, but I would think no more than double that. I'm looking into urethane and synthetic tyres, but a lot use petroleum products and its how much crude oil is left, and can you refine it.