Oil prices slid in the international market on Friday over a warning of the weak global economy from the European Central Bank (ECB). Benchmark Brent crude futures slipped 0.8% to $65.78 per barrel. U.S. West Texas Intermediate (WTI) crude futures lowered 0.7% to $56.25 per barrel. Official data released today indicated a 21% drop in China’s February dollar-denominated exports.