Oil is an essential lubricant in your engine. It lets metal press against metal without damage. For example, it lubricates the pistons as they move up and down in the cylinders.
1 By the time of the Japanese surrender in August 1945, Korea was the second-most industrialized nation in Asia after Japan itself.  But the wartime mobilization of 1937-45 had reintroduced harsh measures to Japanese colonial rule, as Koreans were forced to work in Japanese factories and were sent as soldiers to the front.
United States Army Military Government in Korea. The United States Army Military Government in Korea (USAMGIK; Korean: ì¬ì¡°ì  ë¯¸ì¡êµ° ì¬ë ¹ë¶ êµ°ì ì²­; Hanja: å¨æé®®ç¾é¸è»å¸ä»¤é¨è»æ¿å»³) was the official ruling body of the southern half of the Korean Peninsula from September 8, 1945 to August 15, 1948.