### Question
What is the definition of used oil?


### Answer
The definition of **used oil** is as follows in *42 U.S.C. § 6363*:

> any oil which has been refined from crude oil, has been used, and as a result of such use has been contaminated by physical or chemical impurities

#### Citation:
  - *42 U.S.C. § 6363*
  - Heading: **CHAPTER 76-AGE DISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS > SUBCHAPTER III-IMPROVING ENERGY EFFICIENCY > Part D-Other Federal Energy Conservation Measures**

