Brent crude for December settlement lost 32 cents to $59.59 a barrel on the London-based ICE Futures Europe, paring its weekly drop to 1.5%.
West Texas Intermediate Crude oil futures for November ended up $0.55, or about 1%, at $53.36 a barrel.
In the third quarter, China's economic growth slowed to 6 per cent year on year, its weakest for 27-1/2 years and below expectations, dogged by soft factory production amid sluggish domestic demand and continuing trade tensions with the United States.
Underlining that view, Chinese official data released on Friday showed robust refinery throughput in September, rising 9.4 percent from a year earlier to 56.49 million tonnes, on increases from new refineries and some independent refiners resuming operations after maintenance. With a drop-off in exports to the US expected to continue due to the trade war, the Chinese economy is likely to keep struggling as deflationary pressures hit company profits.More news: Astros' Jose Altuve named MVP of AL Championship Series
And for those who worry about reduced demand for gasoline specifically and crude in general, the International Energy Agency revealed on Thursday that the number of SUVs operating around the world grew from 35 million in 2010 to over 200 million previous year, a 60 percent increase. Oil and gas rigs in Canada are down 48 year-on-year.
The system transports the Forties crude oil stream that makes the biggest contribution to the Brent benchmark.
Traders were also looking ahead to the weekly oil reports from the American Petroleum Institute (API) and the Energy Information Administration (EIA). Companies added one oil rig in the week to October 18, bringing the total count to 713, General Electric Co's (GE.N) Baker Hughes energy services firm said on Friday.More news: Trump drops plan to host G7 meeting at his Florida resort
The joint technical committee monitoring a global oil production pact between the Organization of the Petroleum Exporting Countries (OPEC) and partners found that compliance is being exceeded, with cuts for September representing 236% of agreed quotas, sources said.
Over the past four weeks, crude oil imports averaged about 6.30 million b/d, down by 1.40 million b/d year-on-year, while crude oil exports averaged about 3.13 million b/d, up by about 945,000 b/d year-on-year.
Even though the number of oil rigs have declined by 164 this year alone, production has grown from 11.7 million bpd at the beginning of the year to 12.6 million bpd for the week ending October 11-a growth of nearly 1 million bpd in less than a year.More news: Chile protests continue despite government U-turn on fare hike