The re-assertion of softer global oil market fundamentals - highlighted by tepid growth, sluggish demand and well-stocked inventories - may break what many are calling an over-extended price rally after U.S. crude futures touched 16-month highs, according to CNBC's latest survey of oil market sentiment.

Data on Monday from China showed the world's second-largest economy grew 7.5 percent in the second-quarter, meeting market forecasts. Still, economists remain concerned about weakness in future quarters, especially on the external demand front.