Brent crude LCOc1 was at $57.30 a barrel, down 37 cents, or 0.6%, by 0126 GMT, while U.S. West Texas Intermediate crude CLc1 fell 15 cents, or 0.3%, to $51.90 a barrel.
"While it's more comfortable to call oil higher, given the likely pent-up demand to lead to a recovery from second quarter, it's far too early to suggest oil market concerns have dissipated," said Stephen Innes, chief market strategist at AxiCorp.