I've been checking into the whole "grease car" biodiesel, etc. thing off and on for the last couple of years...
From what I have been able to learn, on one hand, fryolator/waste oil is a great potential resource.
However, there are also complications with just getting the stuff:
#1 Just getting it:
(A) As the biodiesel movement grows, added to by our wonderful new economy, this stuff is getting bought up by companies that make biodiesel, and "animal rendering" outfits.
(B) As the same movement grows, many sources - restaurants, etc. are adopting a grim view of those private individuals who seek it as being "Scavengers", and that is the most complimentary term I have heard. They don;t want to deal with the private individual so much anymore, except where they have to pay to get rid of it, and that factor is getting less common all the time.
(C) A check of the 'Grease Car' forums shows many actual resulting problems with using this as a fuel for vehicles, and with getting it at all.
#2: Technically, but very realistically, there are legal complications:
(A) It may, in many areas, be technically illegal to have/use the "Caustic" materials used to refine it, or otherwise separate it from resulting glycerine "at home" or at all.
(B) It may, in many areas, be illegal to essentially process or refine (pick a word) fuel "at home" or in general - without permit/licensing/regulation/etc. (see next)
(C) Such activity, in many areas, requires permitting/licensing/regulating/etc. and private individuals may not even qualify to do so at all, - legally.
(D) The IRS has an issue with people essentially not paying fuel tax on a "fuel" - most likely when intended for fuel for a vehicle, but possibly also for heating fuel, as I would like to use it for.
There may be 'counter-technicalities', or Loopholes regarding if it is not used for heating a dwelling, but a greenhouse or "outdoor" use.
Thus, in many places, it is simply not practical to get it or do anything with it at all. There are of course exceptions, and I am sure someone could say that "They really don't care", which is much like the 'New York' phrase "What could go wrong, eh?" - but if there is one poor sucker out there who gets some book thrown at them, it will likely be me or you.
I would really like to get into this stuff for heating a greenhouse or other things, but I'm afraid this is quickly turning into another one of those things that sounds good, but is in the end a red herring and a problem waiting to happen.
I welcome and appreciate any factual, reliable, first-hand information to the contrary, especially related to the State of Oregon and the Klamath County area.