I don't know where these people are getting their information, but the American Petroleum Institute says the United States has about a 70 year domestic oil reserve, and proven reserves of American oil are increasing each year, not declining. North America, including Canada and Mexico, has about a 200 year oil reserve. This war is about terrorism, not oil.
The world now has about an 805 year oil supply.
American Petroleum Institute.
For the webTVers:
http://www.api.org/edu/factsoil.htm
Supplied Domestically 38.2 % Canada 9.2 % Saudi Arabia 8.0 % Venezuela 7.8 % Mexico 7.0 % Nigeria 4.5 % Iraq* 3.1 % United Kingdom 1.9 % Norway 2.4 % Colombia 1.7% Angola 2.0 % All Other Countries 11.6