Notes and Sources

[25]  Quality and prices vary among imported light, sweet crudes. For example, Nigerian Bonny Light usually is worth 15 cents a barrel more than WTI, and Norwegian Oseberg is discounted by about 55 cents a barrel. See NYMEX Light Sweet Crude Oil Futures Contract Specifications, web site www.nymex.com/CL_spec. aspx. 

[26]  Energy Information Administration, Form EIA-856, “Monthly Foreign Crude Oil Acquisition Report” (1985-2005). 

[27]  Energy Information Administration, Form EIA-856, “Monthly Foreign Crude Oil Acquisition Report” (1985-2005). 

[28]  See Purvin & Gertz, Inc., “Global Petroleum Market Outlook—An Online Global Service,” Petroleum Balances (2004), web site www.purvingertz.com/studies. html.

[29]  U.S. Environmental Protection Agency, “Tier 2/ Gasoline Sulfur Final Rule” (Washington, DC, February 2000), web site www.epa.gov/tier2/finalrule.htm; “Control of Air Pollution From New Motor Vehicles: Heavy-Duty Engine and Vehicle Standards and Highway Diesel Fuel Sulfur Control Requirements Final Rule” (Washington, DC, January 2001), web site http://www.epa.gov/fedrgstr/EPA-AIR/2001/January/ Day-18/a01a.htm; and “Control of Emissions of Air Pollution From Nonroad Diesel Engines and Fuel Final Rule” (Washington, DC, June 2004), web site www.epa.gov/fedrgstr/EPA-AIR/2004/June/Day-29/ a11293a.htm.