Crude prices declined below 65 dollars a barrel prior to the U.S. government's weekly inventory report.
Light, sweet crude for June delivery lost 1.30 dollars to 64.97 dollars a barrel on the New York Mercantile Exchange.
July Brent crude dropped 97 cents to 69.52 dollars a barrel on the ICE Futures exchange
The Energy Information Administration, who is to release inventory report on Wednesday, said last week that domestic gasoline inventories remain well below the average for this time of year.
Gasoline futures ended lower ahead of the report, but retail gasoline prices keep rising.