Notes of interest:
1. OPEC isn't exclusively Middle Eastern countries:
Iran, Iraq, Kuwait, Qatar, Saudi Arabia and the United Arab Emirates are.
But Algeria, Indonesia, Libya, Nigeria and Venezuela aren't.
2. The table seems a bit odd - I note the Persian Gulf nations (Bahrain, Iran, Iraq, Kuwait, Qatar, Saudi Arabia, and United Arab Emirates) are also, with the exception of Bahrain, OPEC nations - why all the columns?
3. Reading the fine print I find this gem:
Notes: The country of origin for refined petroleum products may not be the country of origin for the crude oil from which the refined products were produced. For example, refined products imported from refineries in the Caribbean may have been produced from Middle East crude oil.
4. So I figure it's probably better and more accurate to base it on crude oil imports than petroleum. Partly due to the fine print, but also because crude oil is used for much more than just petroleum.
According to this table
here, the country that imported the most crude oil into the US in 2001 was Saudi Arabia, followed by Mexico, Canada and Venezuela. Saudi Arabia's still in the Middle East ain't it?

And this despite the fact that the three next highest importers are all much much closer to the US - No 2 and No 3 even share borders with the US.