To survive the apocalypse you may find your self trekking across the wasted world, looking for safety, possibly held up on a farm trying rebuild some semblance of society. In many circumstances you will want to make the best use of whatever combustion engines you can find. They’ll be plenty of rusted out cars out there, but no gas. Get a leg up on those freakazoid cannibals by filling up your Mad Max machine with biodiesel.
You maybe able to scavenge traditional gas or diesel. However, it would probably be prudent to have a working knowledge of making your own biodiesel. “Biodiesel!” You say, “Isn’t that just for hippies?” Yes, but if they are the only ones who know how to make it, then the post-apocalyptic world will be run by hippies. That’s scarier than freakazoid cannibals. Think of Mad Max in a VW bus… (continued)