Vegetable Fuel

Looking for info on how to convert the vegetable oil used in oil used for heating oil.

You want to turn into biodiesel, but it is not a trivial thing to do, and - unfortunately, there are technical problems with burners etc. viscosity, to say that this is not so easy to convert over to pure biodiesel in the heating system. Currently, most companies that sell biodiesel for home heating have to sell it as a mixture with conventional oil.
If you want to know more, however, there are many sites out there biodiesel - biodiesel Google, and you'll find everything you need to know.

A good site is JourneytoForever: http://journeytoforever.org/biodiesel.ht ...

I think the same way you do with biodiesel. You filter all the garbage. Boil all water impurities. And treat them with rubbing alcohol and remove the glycerin.