The reason I'm transporting in a 55 gallon drum is to avoid any DOT Haz-Mat issues. WMO is a hazardous material if transported in quantities (I forget the exact amount, but I recall a 55 gallon drum being lower than that amount).
I used to pickup/ deliver used oil in a tractor trailer tanker, it WAS NOT haz-mat at the time a few years ago. no placards were required either.
I also have a "A" CDL with haz-mat endorsement.
man, I wish I had that job now!! id be set!
you wont have any problems wit used oil or mixed
Now back on topic..
i have a simple way 55 gal drums carried on back of truck 12volt transfer pump with nozzel from oil site to my drums.
pump it out when i get home to storage batrrels, process it to ready to use in 275 gal tote.
if needed il have an immersion heater to boil off water..