Can you get paid for your used motor oil?

Unlikely. Regulations vary form state to state with some allowing facilities to utilize fluids generated in-house as a heat source. You might approach such a place with your quantity but don't expect much for it. If you have a large amount I recommend you research any relevant transportation regulations. Heavy penalties usually accompany a spill. Many auto parts chains will take your used oil for free and in doing so you lessen the demand for virgin base stocks. This may contribute to lower costs of subsequent new oil purchases.