### Question
What does re-refined oil mean?


### Answer
**Re-refined oil** has the following meaning in *42 U.S.C. § 6903*:

> used oil from which the physical and chemical contaminants acquired through previous use have been removed through a refining process

#### Citation:
  - *42 U.S.C. § 6903*
  - Heading: **CHAPTER 81-ENERGY CONSERVATION AND RESOURCE RENEWAL > SUBCHAPTER I-GENERAL PROVISIONS**

