Oil prices rose past $83 in Asian trade as a freefalling greenback and bleak US employment numbers further raised expectations of intervention by the Federal Reserve, analysts said.
New York's main contract, light sweet crude for November delivery, advanced 38 cents to $83.07 a barrel.
Brent North Sea crude for December rose 13 cents to $84.33 a barrel on its first day of trade.
Oil prices were boosted by a plunge in the value of the greenback, said Victor Shum, senior principal of Purvin and Gertz energy consultants in Singapore.