Petrol recovery from WMO/PETROL mix or crude oil.

I have a batch of Waste Motor Oil (WMO) that includes some gasoline. It's common for someone to mix various petroleum waste products into a single batch.

So, here we have a batch of waste oil with a portion of gasoline in it. I'm attempting to recover some gasoline from this oil/gasoline mixture. This same method can also be applied to crude oil, as long as it contains gasoline