Brent crude narrowed by 42 cents at $109.33 as investors moved away from trading riskier assets as political and economic turmoil continues in Greece, in turn affecting other economies on the continent.

Germany and France are working to keep the debt ridden nation in the union, but the European Central Bank has stopped providing liquidity to some Greek banks, reported Reuters.

Meanwhile, US crude climbed 53 cents to $93.34, its first weekly rise in five sessions.

US President Barack Obama is expected to seek support from other leaders at a summit this weekend over its plans to tap into emergency oil reserves ahead of an EU embargo of Iranian crude in July.