Actually according to the Senate investigation of 2006, almost 60% of the price of oil is attributable to rampant speculation (aka..manipulation via Goldman Sach's).
2006 Senate Report - Until recently, US energy futures were traded exclusively on regulated exchanges within the United States, like the NYMEX, which are subject to extensive oversight by the CFTC, (Commodity Futures Trading Commission)including ongoing monitoring to detect and prevent price manipulation or fraud. In recent years, however, there has been a tremendous growth in the trading of contracts that look and are structured just like futures contracts, but which are traded on unregulated OTC electronic markets.
The trading of energy commodities by large firms on OTC electronic exchanges was exempted from CFTC oversight by a provision inserted at the behest of Enron and other large energy traders into the Commodity Futures Modernization Act of 2000 in the waning hours of the 106th Congress. The impact on market oversight has been substantial. NYMEX traders, for example, are required to keep records of all trades and report large trades to the CFTC. These Large Trader Reports, together with daily trading data providing price and volume information, are the CFTC’s primary tools to gauge the extent of speculation in the markets and to detect, prevent, and prosecute price manipulation. In contrast to trades conducted on the NYMEX, traders on unregulated OTC electronic exchanges are not required to keep records or file Large Trader Reports with the CFTC, and these trades are exempt from routine CFTC oversight. In contrast to trades conducted on regulated futures exchanges, there is no limit on the number of contracts a speculator may hold on an unregulated OTC electronic exchange, no monitoring of trading by the exchange itself, and no reporting of the amount of outstanding contracts (“open interest”) at the end of each day.”
http://www.financialsense.com/editorials/engdahl/2008/0502.html