West Texas Intermediate sustained its biggest weekly gain of the year as freezing temperatures in the US boosted demand for heating oil.
Crude futures were little changed after climbing 2.4 per cent last week.
Heating oil surged to the highest price in five months amid frigid weather in the US. Commodity Weather Group forecasts January will be the coldest month so far this century in the lower 48 states.
"The cold weather in the US is driving heating oil and natural gas prices, and that's driving the WTI price," Tetsu Emori, a senior fund manager at Astmax Asset Management in Tokyo, said by phone. "Demand for middle distillates is quite good, and inventories are getting smaller."
WTI for March delivery was up at US$96.73 a barrel, up US9c, on the New York Mercantile Exchange at 11:20am Singapore time. The contact earlier rose as much as 0.6 per cent. It closed down US68c, or 0.7 per cent, at US$96.64 on January 24. The volume of all contracts traded was about 10 per cent less than the 100-day average.