Used oil.

[Frank(Mi.)]

Used oil furnace in my shop. Insurance company sent me hate mail about my wood furnace: Remove it, or we cancel your coverage! So I took out the wood furnace, and bought the used oil furnace. I miss the wood fire, but it sure is nice to walk in and push the button.

Our County charges $1.50 per gallon to drop it off. I take it to Walmart where there is no charge but you have to log your name/ address...

 

[Ray,IN]

Okay so I want to believe in the goodness of humanity, I'll go with the 'honest mistake". Reoccurring honest mistake, but mistake. I can see where Dingo takes his oil back to be disposed of and somebody sits it in a corner. Shift change comes along and somebody else sees it and restocks it on the shelf.

The older I get the more cynical I get, I guess not ever thing has to be nefarious.

It's been documented that's done previously with jugs of DEF at WM. One of my cousins bought a box of DEF at WM, got home, removed the cap and it was water.