Re-refined Motor Oil
The oil in a motor oil product does break down and burns as it is used in an engine — it also gets contaminated with particles and chemicals that make it a less effective lubricant. Re-refining cleans the contaminants and used additives out of the dirty oil. From there, this clean "base stock" is blended with some virgin base stock and a new additives package to make a finished lubricant product that can be just as effective as lubricants made with all-virgin oil. The United States Environmental Protection Agency (EPA) defines re-refined products as containing at least 25% re-refined base stock, but other standards are significantly higher. The California State public contract code defines a re-refined motor oil as one that contains at least 70% re-refined base stock.
Read more about this topic: Motor Oil
Famous quotes containing the words motor and/or oil:
“The motor idles.
Over the immense upland
the pulse of their blossoming
thunders through us.”
—Denise Levertov (b. 1923)
“I became increasingly anarchistic. I began to find people of my own class vicious, people in clean collars uninteresting. I even accepted smells, personal as well as official. Everyone who came to the studio smelled either of machine oil or herring.”
—Margaret Anderson (1886–1973)