This document discusses properties and uses of petroleum fractions, the contribution of petroleum and natural gas to Malaysia's economic development, and efficient ways of using petroleum. It outlines how various petroleum fractions such as petrol, naphtha, kerosene, diesel, lubricating oil, and fuel oil are used for electricity generation, vehicles, heating, chemicals, and other purposes. It also notes that petroleum and natural gas have been the largest contributors to Malaysia's economic development through taxes, dividends, jobs, and higher standards of living since oil wells were discovered in 1910. The document concludes with recommendations for more efficient petroleum use such as carpooling, public transport, recycling, and reuse.