So I am an Oil Enthusiast novice, I only started doing my own oil changes two years ago. When I did my first one I checked where to send the used oil. It is a transfer station nearby. Read all the rules and was ready to go. I had 4.2L of used oil. So I put 4.2L into two used distilled water containers. Took it to the transfer station, and they refused to take it as my oil wasn't in an Oil Containers... I pointed out nowhere on their website did they say this was a requirement. No amount of arguing made a difference. It was definitely a learning experience.