Ten Facts That Nobody Told You About Base Oils
Ten Facts That Nobody Told You About Base Oils API Base Oil Groups At the beginning of 1990 in the early 1990s, the American Petroleum Institute implemented a system to describe various bases of oil. This led to the development and introduction of group numbers for base oils Base oils of Group I are the older, traditional base oils produced by the process of solvent refining to remove weaker chemical structures or harmful actors (ring structures, or structures that have double bonds) from crude oil. Refining with solvents was the principal technique employed in refineries constructed between 1940 and the year 1980.