Rich Grise wrote:

Pete C. wrote:
Rich Grise wrote:
Pete C. wrote:
(snip)
Run your existing diesel tractor on bio or wvo and be "green"...

What's "wvo?"

Waste Vegetable Oil a.k.a. used fryer oil. Older diesel engines run just
fine on it direct without bio-diesel processing.

Ah! Biodiesel! Somewhere on this NG I posted something about biodiesel,
wondering why somebody hasn't already jumped on it?

Used deep-fry oil is free - in fact, the way I understand it, restaurants
currently have to pay somebody to haul it off for disposal

Nope, they get paid for the waste oil. They have big tanks ~500 gal they
collect it in and the recycling company stops by to pick it up each
month.

what's keeping
somebody from going around, talking to restarateurs, offering to haul away
their used oil cheaper than the garbage/hazmat people are doing it, doing
some filtration, and selling it for, say, two bucks a gallon?

Already being done. Don't think it's going to bio-diesel though,
probably used as feed stock for some other oil based stuff.