I have a small wash tank with a pump. Don't use it very much as a pressure washer, or hose pipe, and simple green clean stuff and then into my blasting cabinet.
I have a 10 gal heavy duty plastic jug. I pour all my oil changes and other such liquids into it and take to a recycling place....and the spirits in the cleaning tank take care of themselves. As Denny mentioned, the gunk can go into a plastic bag and its gone.
For what its worth. Advance wants everyone's used oil anyway. It brings them .50 per gal.
