I have sold used oil before. Mostly oil out of large transformers diatect oil i believe or something like that. Mostly though its been hydraulic fluid or 90 weight well I don't know if its 90 weight but that's what I always heard it called. The stuff is thick like honey. I know I got over a buck usually per gallon. They always deducted for water once they figured out what the percentage of water to oil was when it was contaminated or tainted oil.



Never had a problem with a 55 gallon drum collapsing they always would open up both ports on the top of barrel before sticking the tube from the vac truck in it. It would suck up like 30 gallons a minute of regular oil or something crazy like that. I remember when we put it in barrels and lined them up in a row it didn't take long to suck them all dry.