"The main hydrocarbon molecules present in crude oil, like paraffins, naphtenes and aromatics, are discussed. Structural formulas are shown as graphical representations. Moreover, the main method to analyze the composition of oil, gas chromatography, is explained. || After fractionating the crude oil by distillation, the main products are gas, gasoline, kerosine, diesel, oils and residuum. The applications of these fractions are all shortly discussed. For gasoline moreover, there are some extra production methods mentioned. || At the end of the lecture, everything is summarized shortly"