[thackney]

As I understand it, there are two grades of oil ... sweet and (sour?) ...

So, I think I remember we desire ME oil because it is the sweet kind.

Many grades of oil, besides sweet/sour (sulfur content) the heavy/intermediate/light (°API, gravity) make a big difference as well.

Landed Costs of Imported Crude by API Gravity
http://tonto.eia.doe.gov/dnav/pet/pet_pri_land3_k_m.htm

We import all grades.

Percentages of Total Imported Crude Oil by API Gravity
http://tonto.eia.doe.gov/dnav/pet/pet_move_ipct_k_m.htm

1% Sulfur is considered "Sour". Much, but not all, of the Middle East Crudes are sour.

World Oil Qualities
http://www.meglobaloil.com/MARPOL.pdf

[netmilsmom]

I know I told you before, but I’m so glad you’re on our side!