This excerpt taken from the PBR 20-F filed May 22, 2009.
Imports and Exports
We use exports and imports of crude oil and oil products to balance our domestic production and refinery capacity with market needs and optimize our refining margins, importing light crude for our refineries and exporting heavier crude that is surplus to our needs. We import
diesel due to insufficient production in our Brazilian refineries and export gasoline, largely because ethanol and vehicular natural gas provide a substantial share of Brazils light vehicle transportation fuels. We also export fuel oil and approximately 79% of our bunker fuel production.
The table below shows our exports and imports of crude oil and oil products in 2008, 2007 and 2006: