Oil prices were well off their peak of $135 a barrel on Friday as investors cashed in on five sessions of rises.
US sweet light crude surged to $135.09 on Thursday, before tumbling to close at $130.81 - the first drop in five days. London Brent also fell.
BBC NEWS | Business | Oil cools after vaulting to $135
Does make you wonder quite how much of these price issues are generated by speculators.