Why a multi-fuel vehicle is necessary. First of all when shit hits the fan fuel from a gas pump will be next to impossible to get. However with a manual seed oil press and a still, you can manufacturer a lot of high quality fuel in a hurry. The most common fuel would be the recovery and condensation of gasses from the destructive distillation of wood products. The dryer the wood the better. Hard wood works better than softwoods but all wood works.
THIS IS IMPORTANT FOLKS
The destructive distillation of wood is almost mandatory in a long term chaotic environment.
First of all for every 100 lbs of wood you distill you will get 30 to 40 lbs (depending on the type of wood) of charcoal. This is a clean burning fuel with no odor and no smoke. It also has a higher heat delivery for the working of metal in a forge.
The next largest solid product is a tarry residue. This will run about 8 to 12 pounds depending on the type of wood. This tarry residue is rich in phenol's which when combined with concentrated battery acid, and Nitric Acid (made from battery acid and animal wastes,(pig shit and chicken shit works best) ) yields a high order explosive with about half again more power than TNT. How do I know this you might ask, "Well farm kids do a lot of STUPID THINGS!!!"
The destructive distillation of wood also produces a lot of creosote which can be used for meat preservation, ship treatment, and such medical purposes as an anesthetic, antiseptic, astringent, expectorant, and laxative.
BUT BACK TO MY ORIGINAL PURPOSE. A LOT OF THE LIGHTER LIQUIDS FROM THE DESTRUCTIVE DISTILLATION OF WOOD CAN BE USED AS A MOTOR FUEL. So if you you have a diesel powered generator or vehicle you can use this stuff to get around.
The third largest solid product is Acetic acid with a yield of 3.5 to 7 lbs depending on the type of wood. Acetic acid can be used as a solvent, and in very weak from (5% solution with water and some herbs thrown in) as a food preservative. Can you say pickles.