This page is about the past 5 years of the unprocessed form of crude light oil which is traded worldwide in the unit of bbl (1 US bbl oil = 158.99 l) and in the currency of USD. 5 year chart of crude oil future. Crude ligh oil performance chart in the past five years. Oil vs. US inflation in the past 5 years. 5 year chart of crude oil future* The views contained here may not represent the views of GoldSeek.com, Gold Seek LLC, its affiliates or advertisers. GoldSeek.com, Gold Seek LLC makes no representation, warranty or guarantee as to the accuracy or completeness of the information (including news, editorials, prices, statistics, analyses and the like) provided through its service. Crude oil [USD/barrel] (WTI) 5 years price chart. 1 barrel is cca. 159 liters; 42 US gallons and cca. 35 imperial gallons. Crude oil is a mixture of multiple chemicals. It can be refined to eg.: gasoline, but it is also an important resource for other products of the chemical industry.