rckrwlr: You are not being a "kill joy" at all. I end up with the stuff because I wind up with old x-ray generators that need to be scrapped so I drain the oil into drums. The oil is probably 5-10 years old. Thanks for the info, I have never researched the stuff much but I do know that it's a really fine looking color, thin oil and that people can burn it in a diesel motor, pre-2007 of course.