How could I clean motor oil from an old fish tank?

Aweeby

New member
It was bulky trash day... and someone decided to use a perfectly good 40g tank as a dumping spot for used motor oil. I'd like to use this tank for raising freshwater shrimp later. I know, I've kept fish before. soap = not good. But oil can't be good either, right? Paradox. Yeah. I'll take anything. Help me?
 
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