Quote Originally Posted by speedminded
A little more complex than just filtering it plus used motor oil is toxic. It's refined just like crude oil is but a slightly quicker process.

Most of the time it's used for lubricating oil, not motor oil but the United States Postal Service and National Park Service use re-refined oil in their vehicle fleets.

The oil can be burned in boilers for heat and used to generate electricity, supposedly 2 gallons of motor oil can be used to generate enough electricity to power the average house for 24 hours...who knew!
I was kidding!! lol