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.
By Allen West8:36am June 25, 2014. Today marks the 64th anniversary of the start of the Korean War: June 25, 1950. On that day, the army of the Democratic Peoples Republic of Korea attacked south and initially routed the army of the Republic of Korea. The Korean War was the first conflagration between the expansion of communism against western democracy.