“A lot of the oil they import is from their own foreign operations in Canada, various African countries, Malaysia, and other Asian countries, etc”
Not quite true, almost but no cigar. Here are the top 15 oil exporters to the US:
http://www.eia.doe.gov/pub/oil_gas/petroleum/data_publications/company_level_imports/current/import.html
Crude Oil and Total Petroleum Imports Top 15 Countries
March 2008 Import Highlights: May 29, 2008
Monthly data on the origins of crude oil imports in March 2008 has been released and it shows that two countries exported more than 1.50 million barrels per day to the United States. Including those countries, a total of three countries exported over 1.20 million barrels per day of crude oil to the United States (see table below). The top five exporting countries accounted for 68 percent of United States crude oil imports in March while the top ten sources accounted for approximately 94 percent of all U.S. crude oil imports. The top sources of US crude oil imports for March were Canada (1.795 million barrels per day), Saudi Arabia (1.535 million barrels per day), Mexico (1.232 million barrels per day), Nigeria (1.154 million barrels per day), and Venezuela (0.858 million barrels per day). The rest of the top ten sources, in order, were Iraq (0.773 million barrels per day), Angola (0.384 million barrels per day), Algeria (0.247 million barrels per day), Ecuador (0.231 million barrels per day), and Kuwait (0.199 million barrels per day). Total crude oil imports averaged 9.618 million barrels per day in March, which is an increase of (0.012) million barrels per day from February 2008. Total crude imports for March include 0.035 million barrels per day for Strategic Petroleum Reserves (SPR).
Canada remained the largest exporter of total petroleum in March, exporting 2.542 million barrels per day to the United States, which is an increase from last month (2.464 thousand barrels per day). The second largest exporter of total petroleum was Saudi Arabia with 1.542 million barrels per day.
Crude Oil Imports (Top 15 Countries)
(Thousand Barrels per Day)
Country Mar-08 Feb-08 YTD 2008 Mar-07 YTD 2007
CANADA 1,795 1,920 1,886 1,780 1,825
SAUDI ARABIA 1,535 1,614 1,541 1,216 1,325
MEXICO 1,232 1,231 1,220 1,621 1,475
NIGERIA 1,154 982 1,102 1,290 1,156
VENEZUELA 858 945 980 1,036 1,033
IRAQ 773 780 697 523 464
ANGOLA 384 341 433 696 570
ALGERIA 247 191 269 501 484
ECUADOR 231 169 217 191 214
KUWAIT 199 261 232 288 208
BRAZIL 188 169 175 209 174
COLOMBIA 135 220 174 108 107
RUSSIA 108 80 68 193 92
CONGO (BRAZZAVILLE) 105 97 98 79 58
CHAD 101 89 103 66 74