WTI settled 3.6 percent up at $49.21 a barrel on Wednesday on a weaker dollar, fighting in Yemen and speculative buying.
WTI settled at its highest levels since March 4 after Saudi Arabia and its Gulf Arab allies began airstrikes in Yemen.
U.S. crude settled down 5 percent on Friday as fears about the disruption of crude shipments from Yemen's conflict eased.
Asian equity markets struggled for direction on Wednesday following an uninspiring lead from Wall Street overnight.
U.S. stock index futures indicated a sharply lower open on Thursday, with Dow futures tumbling 130 points after stocks plunged to close over 1 percent lower Wednesday.
U.S. stocks closed lower as investors attempted to find clarity on the timing of a rate hike amid concerns of the dollar's impact on earnings.
The U.S. Treasury Department auctioned off $26 billion of two-year notes at a high yield of 0.598 percent.
European equities finished higher on Tuesday, rising from session lows, as investors reacted to fresh economic data from the euro zone.
Brent fell on Tuesday as the dollar reversed losses and fear of global oversupply persisted, while strong U.S. data limited WTI's losses.
Asian stocks traded mixed late Tuesday as negative impact from the weaker-than-expected China data subsided.
U.S. stock index futures indicated a higher open on Wednesday, as volatility in the dollar continued to spook markets.
The dollar rebounded against the euro on persistent bullishness toward the greenback tied to divergent monetary policies between the U.S. and Europe.
Gold rose to a 2-1/2 week high, rising for the fifth straight session on growing expectations that a interest rate increase could be pushed further.
U.S. stocks closed lower as investors looked ahead to a light week of economic reports amid some consolidation in currency and oil prices.
U.S. Treasury yields dipped on Monday, as traders continued to buy U.S. government debt after dovish comments from the U.S. Federal Reserve.
U.S. stock index futures indicated a higher open on Tuesday ahead of a number of key data releases, amid choppy trade in currencies and oil.
European equities ended lower as investors watched a meeting between the leaders of Greece and Germany.
Gold retained gains to trade near its highest in two weeks, boosted by a weaker dollar and Fed caution on the timing of interest rate hikes.
The dollar fell for a second straight session against a basket of major currencies after traders unwound bullish dollar positions.
U.S. crude settled higher on Monday as a declining dollar offset global oversupply concerns
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Aside from China, European business leaders are also concerned about rumblings in an economy closer to home.
Investors yanked $29.5 billion out of global equity funds in the week ended Aug 26, the biggest single-week outflow on record.
As China's economy slows, companies and countries are rethinking their plans, the New York Times reports.