Iso-Butanol, the fuel that acts like T2K "alcohol"
Iso-Butanol is a biofuel under study that is derived from agricultural waste. It has a whopping 98% efficiency of that of gasoline and it doesn't even use the high-sugar feedstock like sweet sorghum or beets that modern bio-fuels use. It needs a fermentation-distillation system that uses some odd microbes, the infamous E-Coli stomach bug is one, and it needs some finicky kit to make. It's still in the experimental phase (this is actually great news for the world, it doesn't even use the edible parts of the food).
Now, a few of us have never been comfortable with ethanol-methanol fuels for the simple reason is they don't work the way they do in the books. Ethanol has a very high burning temperature and needs to be mixed with other fuels to lower it. Methanol has, to use the Australian idiom, bugger-all energy. Neither fuel has nearly enough energy to run a vehicle or frankly you'd see everyone cooking fuel now.
So, for those OCD people such as myself you can consider that the iso-butanol revolution came early. As the war ground on the fuel crunch hit and one side or the other introduced the fuel and the other side quickly caught on and did likewise. Specialty brewing/distilling kits were issued to the troops and these are the "stills" we see in the game.
If you don't like having that sort of high-efficiency fuel around simply rule that the kits the troops make and the microbe stock they have access to is less efficient.
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