Engine oil in large waste drum for heaters

I have a large quantity of waste oil at my shop that needs to be disposed of. I waited until this colder season because I figured some of you guys have heaters that run off oil. Mine is a gasoline heater so I will not need it. Most have come out of customer cars or mine which is performance cars or well maintained so it is all in good shape. There is no water or coolant in the tank.

we save and burn oil at our shop too and when we have an excessive amount saved and its only mid summer we have noco pick some up, it can be free, it can cost you, or they pay you lol. all depends on timing, give them a call and see if there paying

Thanks really appreciate it.