Drain Oil!

Just an FYI for you guys. The facility taking in used oil is required to ask about its source as to not contaminate their oil storage tank. The waste oil companies that pick up the oil always test it for contaminates. ( solvents, flammable's etc)
If it is found to be contaminated, they have to isolate it from the rest of their load and can charge up to several times the normal pick up fee.
Of course all you oil change guys knew that...