Jan. 7 (Bloomberg) -- Abu Dhabi National Oil Co. released official selling prices for crude oil loaded in December, the state-owned company said in a statement faxed to buyers.

The table below gives the official selling prices, together with the change in dollars a barrel, free-on-board at the loading port. Free on board means the buyer will pay for any shipping costs to the destination, and there is no charge to the buyer for delivery to the vessel at the loading port.

The degrees of gravity as defined by the American Petroleum Institute are also shown.

Crude Variety   API    Dec.      Nov.    Change
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Murban          39    42.10     51.40    -9.30
Lower Zakum     40    41.90     51.25    -9.35
Umm Shaif       37    41.10     50.35    -9.25
Upper Zakum     34    38.75     47.85    -9.10
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Differential Over Dubai
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Murban                 1.57     1.56     0.01
Lower Zakum            1.37     1.41    -0.04
Umm Shaif              0.57     0.51     0.06
Upper Zakum           -1.78    -1.99     0.21
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Abu Dhabi National sets prices retroactively for all crude oil cargoes sold during the previous month. Middle East crude oil producers commonly price their cargoes in this manner.

Last Updated: January 6, 2009 21:37 EST