Are you kidding? The US has had its hands on oil and other resources the world over, ensuring favorable prices, preferential treatment and US petrol companies' control over oil springs. To the point of overthrowing governments, including Iran's democratic one back in the day, when they took a oil policy they didn't like. Here's a small example:
Iraq's massive oil reserves, the third-largest in the world, are about to be thrown open for large-scale exploitation by Western oil companies under a controversial law which is expected to come before the Iraqi parliament within days.
The US government has been involved in drawing up the law, a draft of which has been seen by The Independent on Sunday. It would give big oil companies such as BP, Shell and Exxon 30-year contracts to extract Iraqi crude and allow the first large-scale operation of foreign oil interests in the country since the industry was nationalised in 1972.
http://news.independent.co.uk/world/middle_east/article21325...
or:
The Carter administration – the most “idealist” of the post-World War II presidencies in terms of its rhetoric – openly acknowledged in National Security Directive (NSD) 63 (and after the Soviet invasion of Afghanistan) the need to ensure “the availability of oil [from the Middle East] at reasonable prices.” Carter’s administration announced that any “attempt by any outside force to gain control of the Persian Gulf region will be regarded as an assault on the vital interests of the United States. It will be repelled by the use of any means necessary, including military force.” This policy of targeting unfriendly governments that reside in regions tangential to the Middle East was further reinforced in other official policy documents. In discussing U.S. policy, the Reagan administration explained in NSD 27 the need “to ensure the U.S. access to foreign energy and mineral forces” as a key aspect of “national security” priorities. Carter established a similar concern in NSD 63, discussing U.S. interest in dominating Middle Eastern oil as also extending to the “horn of Africa.”
(...)
Policy motivations – simply put – have long been driven by concern with dominating Middle Eastern oil supplies by force, and with support for repressive, U.S.-friendly regimes in geographic areas (such as North Africa) that are tangential to the Middle East. With regard to oil concerns, President George H. W. Bush articulated U.S. policy toward the Middle East, explaining in National Security Directive 26 that: “Access to Persian Gulf oil and the security of key friendly states in the area are vital to United States national security. The United States remains committed to its vital interests in the region, if necessary and appropriate through the use of military force, against the Soviet Union or any other force with interests inimical to our own.”
http://www.counterpunch.org/2011/10/24/what-the-establishmen...
or this:
http://www.salon.com/2011/06/11/libya_9/singleton/