Well Lee, I guess we will have to agree to disagree. I don't know exactly how this thread about a tip for substituting used motor oil for bar oil devolved into waste oil diesel, enviro-wackos, frog hairs, crude oil refining, lengthy urls, etc.. I think you might have answered why the EPA approves of waste oil use in diesel fuel. Perhaps the benefits outweigh the cons. This is something that the EPA can only answer. However, I am sure if we were discussing over a beer vs a keyboard we would perhaps have a better understanding and appreciation of each other's points of views.
I do think the devolution of the thread had something to do with some posters taking issue with the point I (and some others) were trying to make. My point was and still is
"that used motor oil is more hazardous than designated bar oil and therefore it is not a good idea to use as bar oil." I am strictly talking about
bar oil substitution, not pollution from other sources, carbon footprints, Whitehorse's recycling program, government inefficiency, carcinogens of wood dust, etc.
I agree this is small potatoes compared to scale of most ills of planet. Yet there are still hazards associated with used motor oil substitution as bar oil. I just don't understand why you would intentionally do something which increases your exposure and can potentially
add to the chemical burdens on your body, in order to save a few bucks. Especially when cleaner bar oil is fairly cheap and available. If vegetable oils work, even better.
The assertion that the hazards with used motor oil are non-existent is false. As has been stated in previous posts, used motor oil does contain a cocktail of heavy metals, PAHs, and other compounds. Here is another link (this is short one): (broken link removed to http://www.fws.gov/caribbean/es/PDF/Contaminants/oilused.pdf) It is from the US Fish and Wildlife Service.
In this document, it states a lot of things, including:
"Hydrocarbons from oil can move to atmosphere or settle through water to bottom sediments, where they may persist for years [961]. Metals from oil may build up in various media [961].
The concentration of various PAHs is much higher in used oil than in (fresh) lubricating oil [519]. For example, Grimmer et al. reported concentrations of dibenz(a,c)-anthracene, 4-methylpyrene, fluoranthene,
benz(a)anthracene, benzo(e)pyrene, benzo(g,h,i)perylene, and benzo(a)pyrene, respectively, 36, 49, 253, 720, 1,112, 4,770, and 7,226 times higher in "used" compared to "fresh" oil [519]." If you have any studies/literature that speaks differently, please let us know.
In this forum, I have always been impressed the way members help each other. There are countless tips given each day which are invaluable. However, every once in a while, a tip is given that has been proven by more knowledgeable members not to be as helpful or outright dangerous. Those are the times more knowledgeable members will pipe up to give their two cents.
As this is related to my education and field of work, I felt it my duty as a proud Hearth member to give "two cents" to make members aware of the potential hazards via exposure through this use. It is not only about the "birds, fish and the trees" but your own exposure too (skin absorption, inhalation, ingestion). My intent was and is to help us members to be safe as possible out there.
Please try to shake your biases and heed what I have written. I have no illusions of environmental piety and I do not have a desire to control people's lives. Just remember, I make money from the actions and misadventures of people who were ignorant, arrogant, and/or wanted to save a buck, etc.