They've found some niche that allows them to make a profit but it's not enough for Big Oil to get involved. Perhaps demand isn't sufficient. IDK, but clearly rerefining isn't a major industry in the US and most used oil does not get rerefined.Then why does Safety Kleen and Vertex rerefines oils? And sell it to places like my workplace and fleets, etc. you can’t tell me those guys are not making a profit.