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.
Korea is a historical country in East Asia; since 1945, it has been divided into two distinct sovereign states: North Korea and South Korea. Located on the Korean Peninsula, Korea is bordered by China to the northwest and Russia to the northeast. It is separated from Japan to the east by the Korea Strait and the Sea of Japan. Korea emerged as a singular political entity in 676 AD, after centuries of conflict among the Three Kingdoms of Korea, which were unified as Unified Silla to the south and