http://www.shentonenergy.com/our-product/crude-oil/ Crude Oil could be traced back in the 18th century. But even before in the ancient times, this kind of oil was already being used by some people in the Babylon. This means that ancient people have found already the great use of this kind of product especially for lighting purposes. Thus, no wonder even up to this time, this still exists because of its great significance to people's lives. Read more at http://www.shentonenergy.com/