[Fraxinus]

I'm not sure what that means, but it sounds like you have to add alcohol to used cooking oil to produce biodiesel?
Correct. Either Ethanol or Methanol will work just fine.

In any event, I'll just hold out until somebody figures out how to turn dog poop into fuel. Then, I'll go back to the shelter and get two more mutts just like the fertilizer factory I already have in the backyard.
There is a process that will do this, it is often referred to as thermal depolymerization. I do not believe that this process can be done on a home scale, or efficiently with equipment that can fit into an ordinary garage.

[SAJ]

Right. No way to do TDP at home, unless 'home' happens to be in the middle of nowhere, and in that case obtaining sufficient electric power would be a problem (not that TDP needs a lot of power; very good net return on energy, something like 15% BTU loss). Not a single zoning code of which I'm aware would tolerate any homeowner attempting this.

However, TDP doesn't require any finished alcohols to operate, which fact among others makes it commercially viable **until** gov't idiots start messing with it.