Oil prices dipped in the international market on Friday, as China registered its weakest quarter in terms of economic growth in almost three decades. Brent crude was down by 0.4%, to $59.70 a barrel. US WTI crude also slipped 0.1%, to $53.89 per barrel. China’s gross domestic product (GDP) growth slowed to 6% year-on-year in the third quarter, declining to its weakest pace in 27 and a half years.