Oil Price – historical data
[Update 16 October 2014] See Oil Price – historical data (update) for latest tips.
The oil price is the Financial Times (FT) headline today, so an appropriate day to update details of which library databases provide oil price.
Bloomberg has the greatest detail of commodity trading and related news. Datastream (graph below), FactSet ExcelConnect and Global Financial Data also have these benchmark oil prices.
There are some websites with oil price information, for example, http://www.oil-price.net/index.php?lang=en and http://www.eia.gov/dnav/pet/pet_pri_spt_s1_d.htm. However, most provide graphs over different time frames rather than access to the underlying data.
Chart of benchmark crude oil prices 2005-2010.