[Bernard]

I'm not sure what that means, but it sounds like you have to add alcohol to used cooking oil to produce biodiesel?

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.

[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.

[B Knotts]

I'm not sure what that means, but it sounds like you have to add alcohol to used cooking oil to produce biodiesel?

Yep.

Many people are now homebrewing biodiesel from various vegetable oil sources. Here's how it's done:

Collaborative Biodiesel Tutorial