Oil futures down after hitting fresh multiyear lows

Oil futures slid further downhill in electronic trade early Monday, with a rising dollar helping weigh on the commodity.

Benchmark Nymex crude futures for February CLG5, -1.67%  fell by 93 cents, or 1.8%, to $51.76 a barrel on the Globex platform.

Rival benchmark Brent North Sea crude LCOG5, -1.36%  retreated 87 cents, or 1.5%, to $55.55 a barrel, extending a 0.2% drop on Friday.